Celebrating 18 Years on the Web
TODAY IN SCIENCE HISTORY ®
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “Environmental extremists ... wouldn’t let you build a house unless it looked like a bird’s nest.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index T > Category: Theory

Theory Quotes (582 quotes)


'Unless,' said I [Socrates], either philosophers become kings in our states or those whom we now call our kings:. and rulers take to the pursuit of' philosophy seriously and adequately, and there is a conjunction of these two things, political power and philosophic intelligence, while the motley horde of the natures who at present pursue either apart from the other are compulsorily excluded, there can be no cessation of troubles, dear Glaucon, for our states, nor, I fancy for the human race either. Nor, until this happens, will this constitution which we have been expounding in theory ever be put into practice within the limits of possibility and see the light of the sun.
Plato
The Republic 5 474ce, trans. P. Shorey (1930), Vol. 1, Book 5, 509.
Science quotes on:  |  Cessation (10)  |  Compulsion (11)  |  Constitution (26)  |  Exclusion (11)  |  Happening (32)  |  Horde (2)  |  Human Race (49)  |  Intelligence (138)  |  King (23)  |  Light (246)  |  Limit (86)  |  Nature (1029)  |  Philosopher (132)  |  Philosophy (213)  |  Politics (77)  |  Possibility (96)  |  Practice (67)  |  Pursuit (55)  |  Ruler (12)  |  Socrates (14)  |  State (96)  |  Sun (211)

... one of the main functions of an analogy or model is to suggest extensions of the theory by considering extensions of the analogy, since more is known about the analogy than is known about the subject matter of the theory itself … A collection of observable concepts in a purely formal hypothesis suggesting no analogy with anything would consequently not suggest either any directions for its own development.
'Operational Definition and Analogy in Physical Theories', British Journal for the Philosophy of Science (Feb 1952), 2, No. 8, 291.
Science quotes on:  |  Analogy (46)  |  Hypothesis (227)  |  Model (64)

... there is an external world which can in principle be exhaustively described in scientific language. The scientist, as both observer and language-user, can capture the external facts of the world in prepositions that are true if they correspond to the facts and false if they do not. Science is ideally a linguistic system in which true propositions are in one-to-one relation to facts, including facts that are not directly observed because they involve hidden entities or properties, or past events or far distant events. These hidden events are described in theories, and theories can be inferred from observation, that is the hidden explanatory mechnism of the world can be discovered from what is open to observation. Man as scientist is regarded as standing apart from the world and able to experiment and theorize about it objectively and dispassionately.
'Introduction', Revolutions and Reconstructions in the Philosophy of Science (1981), xii. In John Templeton and Robert L. Herrmann, Is God the Only Reality (1994), 11-12.
Science quotes on:  |  Fact (609)  |  Observation (418)

...scientific theory is a contrived foothold in the chaos of living phenomena.
Function of the Orgasm
Science quotes on:  |  Chaos (63)  |  Contrive (4)  |  Live (186)  |  Phenomenon (218)  |  Scientific (169)

Dilbert: It took weeks but I’ve calculated a new theory about the origin of the universe. According to my calculations it didn’t start with a “Big Bang” at all—it was more of “Phhbwt” sound. You may be wondering about the practical applications of the “Little Phhbwt” theory.
Dogbert: I was wondering when you’ll go away.
Dilbert comic strip (1 Jan 1993)
Science quotes on:  |  Application (117)  |  Big Bang (38)  |  Calculation (67)  |  New (340)  |  Origin Of The Universe (13)  |  Practicality (6)  |  Sound (59)  |  Start (68)  |  Week (8)  |  Wonder (134)

Dilbert: You joined the “Flat Earth Society?”
Dogbert: I believe the earth must be flat. There is no good evidence to support the so-called “round earth theory.”
Dilbert: I think Christopher Columbus would disagree.
Dogbert: How convenient that your best witness is dead.
Dilbert comic strip (9 Oct 1989).
Science quotes on:  |  Belief (400)  |  Christopher Columbus (13)  |  Convenience (25)  |  Death (270)  |  Disagreement (11)  |  Earth (487)  |  Evidence (157)  |  Flat (13)  |  Flat Earth (3)  |  Join (15)  |  Support (63)  |  Witness (18)

Discovery always carries an honorific connotation. It is the stamp of approval on a finding of lasting value. Many laws and theories have come and gone in the history of science, but they are not spoken of as discoveries. Kepler is said to have discovered the laws of planetary motion named after him, but no the many other 'laws' which he formulated. ... Theories are especially precarious, as this century profoundly testifies. World views can and do often change. Despite these difficulties, it is still true that to count as a discovery a finding must be of at least relatively permanent value, as shown by its inclusion in the generally accepted body of scientific knowledge.
Discovery in the Physical Sciences (1969). In Rodney P. Carlisle, Scientific American Inventions and Discoveries (2004), 179.
Science quotes on:  |  Approval (6)  |  Discovery (591)  |  History Of Science (53)  |  Kepler_Johann (2)  |  Knowledge (1128)  |  Law (418)  |  Planet (199)  |  Precarious (4)

Dogbert: So, Since Columbus is dead, you have no evidence that the earth is round.
Dilbert: Look. You can Ask Senator John Glenn. He orbited the earth when he was an astronaut.
Dogbert: So, your theory depends on the honesty of politicians.
Dilbert: Yes... no, wait...
Dilbert comic strip (10 Oct 1989).
Science quotes on:  |  Astronaut (22)  |  Christopher Columbus (13)  |  Death (270)  |  Dependence (32)  |  Earth (487)  |  Evidence (157)  |  Flat Earth (3)  |  John Glenn, Jr. (31)  |  Honesty (16)  |  Orbit (58)  |  Politician (22)  |  Round (15)

La chaleur pénètre, comme la gravité, toutes les substances de l’univers, ses rayons occupent toutes les parties de l’espace. Le but de notre ouvrage est d’exposer les lois mathématiques que suit cet élément. Cette théorie formera désormais une des branches les plus importantes de la physique générale.
Heat, like gravity, penetrates every substance of the universe, its rays occupy all parts of space. The object of our work is to set forth the mathematical laws which this element obeys. The theory of heat will hereafter form one of the most important branches of general physics.
From 'Discours Préliminaire' to Théorie Analytique de la Chaleur (1822), i, translated by Alexander Freeman in The Analytical Theory of Heat (1878), 1.
Science quotes on:  |  All (8)  |  Branch (61)  |  General (92)  |  Gravity (89)  |  Heat (90)  |  Important (124)  |  Law (418)  |  Mathematics (587)  |  Occupy (18)  |  Part (146)  |  Penetrate (21)  |  Physics (301)  |  Ray (32)  |  Space (154)  |  Substance (73)  |  Universe (563)

La théorie des séries infinies en général est justqu’à présent très mal fondée. On applique aux séries infinies toutes les opérations, come si elles aient finies; mais cela est-il bien permis? Je crois que non. Où est-il démonstré qu/on ontient la différentielle dune série infinie en prenant la différentiaella de chaque terme. Rien n’est plus facile que de donner des exemples où cela n’est pas juste.
Until now the theory of infinite series in general has been very badly grounded. One applies all the operations to infinite series as if they were finite; but is that permissible? I think not. Where is it demonstrated that one obtains the differential of an infinite series by taking the differential of each term? Nothing is easier than to give instances where this is not so.
Quoted in Reinhold Remmert and Robert B. Burckel, Theory of Complex Functions: Readings in Mathematics (1991), 125.
Science quotes on:  |  Differential (2)  |  Finite (22)  |  Infinite (88)  |  Operation (96)  |  Series (38)  |  Term (87)

La théorie est l’hypothèse vérifiée, après qu’elle a été soumise au contrôle du raisonnement et de la critique expérimentale. La meilleure théorie est celle qui a été vérifiée par le plus grand nombre de faits. Mais une théorie, pour rester bonne, doit toujours se modifier avec les progrès de la science et demeurer constamment soumise à la vérification et à la critique des faits nouveaux qui apparaissent.
A theory is a verified hypothesis, after it has been submitted to the control of reason and experimental criticism. The soundest theory is one that has been verified by the greatest number of facts. But to remain valid, a theory must be continually altered to keep pace with the progress of science and must be constantly resubmitted to verification and criticism as new facts appear.
Original work in French, Introduction à l'Étude de la Médecine Expérimentale (1865), 385. English translation by Henry Copley Green in An Introduction to the Study of Experimental Medicine (1927, 1957), 220.
Science quotes on:  |  Continually (14)  |  Criticism (52)  |  Fact (609)  |  Greatest (53)  |  Hypothesis (227)  |  New (340)  |  Number (179)  |  Progress (317)  |  Validity (22)  |  Verification (20)

La théorie n’est que l’idée scientifique contrôlée par l’expérience.
A theory is merely a scientific idea controlled by experiment.
Original work in French, Introduction à l'Étude de la Médecine Expérimentale (1865), 40. English translation by Henry Copley Green in An Introduction to the Study of Experimental Medicine (1927, 1957), 26.
Science quotes on:  |  Control (93)  |  Experiment (543)  |  Idea (440)

Les médecins les plus savans en théorie sont rarement les plus habile practiciens.
The doctors most learned in theory are seldom the most skilled practitioners.
Maxim No. 281 in Maximes, Réflexions et Pensées Diverses (1819), 236.
Science quotes on:  |  Doctor (100)  |  Learning (174)  |  Medicine (322)  |  Practitioner (12)  |  Seldom (21)  |  Skill (50)

Nous avons l’obligation aux Anciens de nous avoir épuisé la plus grande partie des idées fausses qu’on le pouvait faire
We are under obligation to the ancients for having exhausted all the false theories that could be formed.
In Digression sur les Anciens et les Modernes (1688), 165. Collected in Oeuvres Diverses (1727), Vol. 3, 139. English version as quoted in John Bagnell Bury, The Idea of Progress: An Inquiry Into Its Origin and Growth (1920), 104.
Science quotes on:  |  Ancient (68)  |  Exhaust (12)  |  False (79)  |  Obligation (13)

Ron Hutcheson, a Knight-Ridder reporter: [Mr. President, what are your] personal views [about the theory of] intelligent design?
President George W. Bush: [Laughing. You're] doing a fine job of dragging me back to the past [days as governor of Texas]. ... Then, I said that, first of all, that decision should be made to local school districts, but I felt like both sides ought to be properly taught...”
Hutcheson: Both sides ought to be properly taught?
President: Yes ... so people can understand what the debate is about.
Hutcheson: So the answer accepts the validity of “intelligent design” as an alternative to evolution?
President: I think that part of education is to expose people to different schools of thought, and I'm not suggesting—you're asking me whether or not people ought to be exposed to different ideas, and the answer is yes.
Hutcheson: So we've got to give these groups—...
President: [interrupting] Very interesting question, Hutch. [Laughter from other reporters]
From conversation with reporters at the White House (1 Aug 2005), as quoted by Matthew Cooper in 'Fanning the Controversy Over “Intelligent Design”', Time (3 Aug 2005). The Time writer stated, “The president has gone farther in questioning the widely-taught theories of evolution and natural selection than any president since Ronald Reagan, who advocated teaching creationism in public schools alongside evolution.” Just a few months later, in the nation's first case on that point, on 20 Dec 2005, “a federal judge [John E. Jones] ruled it was unconstitutional for a Pennsylvania school district to present intelligent design as an alternative in high school biology courses, because it is a religious viewpoint,” as reported by Laurie Goodstein in 'Judge Rejects Teaching Intelligent Design', New York Times (21 Dec 2005). Goodstein also wrote “Judge Jones, a Republican appointed by President Bush, concluded that intelligent design was not science,” and that “the evidence in the trial proved that intelligent design was 'creationism relabeled.' The Supreme Court has already ruled that creationism ... cannot be taught as science in a public school.”
Science quotes on:  |  Alternative (22)  |  Answer (201)  |  Debate (19)  |  Different (110)  |  District (7)  |  Education (280)  |  Evolution (482)  |  Expose (9)  |  Exposed (3)  |  Governor (7)  |  Idea (440)  |  Local (15)  |  Personal (49)  |  School (87)  |  Teach (102)  |  Texas (3)  |  Thought (374)  |  Understand (189)  |  Validity (22)  |  View (115)

Une même expression, dont les géomètres avaient considéré les propriétés abstraites, … représente'aussi le mouvement de la lumière dans l’atmosphère, quelle détermine les lois de la diffusion de la chaleur dans la matière solide, et quelle entre dans toutes les questions principales de la théorie des probabilités.
The same expression whose abstract properties geometers had considered … represents as well the motion of light in the atmosphere, as it determines the laws of diffusion of heat in solid matter, and enters into all the chief problems of the theory of probability.
From Théorie Analytique de la Chaleur (1822), translated by Alexander Freeman in The Analytical Theory of Heat (1878), 7.
Science quotes on:  |  Abstract (43)  |  Atmosphere (63)  |  Chief (25)  |  Determine (45)  |  Diffusion (7)  |  Expression (82)  |  Geometer (6)  |  Heat (90)  |  Law (418)  |  Light (246)  |  Matter (270)  |  Motion (127)  |  Probability (83)  |  Problem (362)  |  Property (96)  |  Represent (27)  |  Same (92)  |  Solid (34)

Von Theorie wild man nicht heller.
Gott geb' täglich unsern Teller.

When theory's light is less than stellar.
Give us, O Lord, our daily Teller.
This rhyme from an alphabet ditty describing various physicists was written for a party at Göttingen.
Quoted in Edward Teller with Judith L. Shoolery, Memoirs: A Twentieth-Century Journey in Science and Politics (2001), 75. The first clause, translated more literally than poetically, is given as, 'When theory does not enlighten us,' in Nina Byers and Gary Williams, Out of the Shadows (2006),130.
Science quotes on:  |  Edward Teller (18)

Wenn uns alle einzelnen Thatsachen, alle einzelnen Erscheinungen unmittelbar zugänglich wären, so wie wir nach der Kenntniss derselben verlangen; so wäre nie eine Wissenschaft entstanden.
If all the individual facts, all the individual phenomena, were directly accessible to us, as we ask for the knowledge of them; no science would ever have arisen.
From original German in Die Geschichte und die Wurzel des Satzes von der Erhaltung der Arbeit (1872), 30-31. English translation by Webmaster using Google translate until it made sense. Also found translated as “If all single facts, all separate phenomena, were as directly accessible to us as we demand that knowledge of them to be; science would never have arisen,” in Ernst Cassirer, The Problem of Knowledge: Philosophy, Science, and History since Hegel (1950), 108. Citing from
Science quotes on:  |  Accessible (11)  |  Arise (32)  |  Ask (99)  |  Fact (609)  |  Knowledge (1128)  |  Phenomenon (218)  |  Research (517)  |  Science (1699)

[In refutation of evolution] There is not enough evidence, consistent evidence to make it as fact, and I say that because for theory to become a fact, it needs to consistently have the same results after it goes through a series of tests. The tests that they put—that they use to support evolution do not have consistent results. Now too many people are blindly accepting evolution as fact. But when you get down to the hard evidence, it’s merely a theory.
[In favor of the teaching of creationism alongside evolution in schools.]
From interview by Miles O'Brien on CNN (30 Mar 1996). Reported from transcript, via Nexis, in New York Magazine (15 Sep 2010).
Science quotes on:  |  Acceptance (41)  |  Blind (35)  |  Consistency (21)  |  Evidence (157)  |  Evolution (482)  |  Fact (609)  |  Merely (35)  |  Result (250)  |  Support (63)  |  Test (96)

A closer look at the course followed by developing theory reveals for a start that it is by no means as continuous as one might expect, but full of breaks and at least apparently not along the shortest logical path. Certain methods often afforded the most handsome results only the other day, and many might well have thought that the development of science to infinity would consist in no more than their constant application. Instead, on the contrary, they suddenly reveal themselves as exhausted and the attempt is made to find other quite disparate methods. In that event there may develop a struggle between the followers of the old methods and those of the newer ones. The former's point of view will be termed by their opponents as out-dated and outworn, while its holders in turn belittle the innovators as corrupters of true classical science.
'On the Development of the Methods of Theoretical Physics in Recent Times', Populäre Schriften, Essay 14. Address to the Meeting of Natural Scientists at Munich, 22 September 1899. In Brian McGuinness (ed.), Ludwig Boltzmann: Theoretical Physics and Philosophical Problems, Selected Writings (1974), 79.
Science quotes on:  |  Men Of Science (97)

A complete theory of evolution must acknowledge a balance between ‘external’ forces of environment imposing selection for local adaptation and ‘internal’ forces representing constraints of inheritance and development. Vavilov placed too much emphasis on internal constraints and downgraded the power of selection. But Western Darwinians have erred equally in practically ignoring (while acknowledging in theory) the limits placed on selection by structure and development–what Vavilov and the older biologists would have called ‘laws of form.’
…...
Science quotes on:  |  Acknowledge (13)  |  Adaptation (40)  |  Balance (43)  |  Biologist (31)  |  Call (68)  |  Complete (43)  |  Constraint (8)  |  Darwinian (5)  |  Development (228)  |  Downgrade (2)  |  Emphasis (14)  |  Environment (138)  |  Equally (18)  |  Err (4)  |  Evolution (482)  |  External (45)  |  Force (194)  |  Form (210)  |  Ignore (22)  |  Impose (17)  |  Inheritance (19)  |  Internal (18)  |  Law (418)  |  Limit (86)  |  Local (15)  |  Old (104)  |  Place (111)  |  Power (273)  |  Practically (9)  |  Represent (27)  |  Selection (27)  |  Structure (191)  |  Western (14)

A conceptual scheme is never discarded merely because of a few stubborn facts with which it cannot be reconciled; a conceptual scheme is either modified or replaced by a better one, never abandoned with nothing left to take its place.
Science and Common Sense (1951), 173.

A discovery in science, or a new theory, even when it appears most unitary and most all-embracing, deals with some immediate element of novelty or paradox within the framework of far vaster, unanalysed, unarticulated reserves of knowledge, experience, faith, and presupposition. Our progress is narrow; it takes a vast world unchallenged and for granted. This is one reason why, however great the novelty or scope of new discovery, we neither can, nor need, rebuild the house of the mind very rapidly. This is one reason why science, for all its revolutions, is conservative. This is why we will have to accept the fact that no one of us really will ever know very much. This is why we shall have to find comfort in the fact that, taken together, we know more and more.
Science and the Common Understanding (1954), 53-4.
Science quotes on:  |  Acceptance (41)  |  Analysis (123)  |  Articulation (2)  |  Challenge (37)  |  Comfort (42)  |  Conservative (7)  |  Discovery (591)  |  Element (129)  |  Experience (268)  |  Fact (609)  |  Faith (131)  |  Framework (15)  |  Granted (3)  |  House (36)  |  Immediate (27)  |  Knowledge (1128)  |  Mind (544)  |  Narrow (33)  |  Need (211)  |  Novelty (19)  |  Paradox (35)  |  Progress (317)  |  Rapidly (10)  |  Reason (330)  |  Rebuild (3)  |  Reserve (7)  |  Revolution (56)  |  Scope (13)  |  Unitary (2)  |  Vastness (9)

A discovery is generally an unforeseen relation not included in theory.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 38.
Science quotes on:  |  Discovery (591)  |  Relation (96)  |  Unforeseen (2)

A formative influence on my undergraduate self was the response of a respected elder statesmen of the Oxford Zoology Department when an American visitor had just publicly disproved his favourite theory. The old man strode to the front of the lecture hall, shook the American warmly by the hand and declared in ringing, emotional tones: ‘My dear fellow, I wish to thank you. I have been wrong these fifteen years.’ And we clapped our hands red. Can you imagine a Government Minister being cheered in the House of Commons for a similar admission? “Resign, Resign” is a much more likely response!
…...
Science quotes on:  |  Admission (10)  |  American (34)  |  Cheer (5)  |  Clap (3)  |  Declare (18)  |  Department (33)  |  Disprove (15)  |  Elder (3)  |  Emotional (13)  |  Favourite (5)  |  Fellow (29)  |  Formative (2)  |  Front (10)  |  Government (85)  |  Hand (103)  |  House Of Commons (2)  |  Imagine (40)  |  Influence (110)  |  Lecture Hall (2)  |  Likely (23)  |  Minister (6)  |  Old Man (2)  |  Oxford (8)  |  Publicly (3)  |  Red (25)  |  Resign (2)  |  Respect (57)  |  Response (24)  |  Ring (14)  |  Self (39)  |  Shake (19)  |  Similar (22)  |  Statesman (10)  |  Stride (7)  |  Thank You (4)  |  Tone (7)  |  Undergraduate (8)  |  Visitor (3)  |  Wish (62)  |  Wrong (116)  |  Year (214)  |  Zoology (28)

A good theoretical physicist today might find it useful to have a wide range of physical viewpoints and mathematical expressions of the same theory (for example, of quantum electrodynamics) available to him. This may be asking too much of one man. Then new students should as a class have this. If every individual student follows the same current fashion in expressing and thinking about electrodynamics or field theory, then the variety of hypotheses being generated to understand strong interactions, say, is limited. Perhaps rightly so, for possibly the chance is high that the truth lies in the fashionable direction. But, on the off-chance that it is in another direction—a direction obvious from an unfashionable view of field theory—who will find it?
In his Nobel Prize Lecture (11 Dec 1965), 'The Development of the Space-Time View of Quantum Electrodynamics'. Collected in Stig Lundqvist, Nobel Lectures: Physics, 1963-1970 (1998), 177.
Science quotes on:  |  Chance (122)  |  Class (64)  |  Current (43)  |  Direction (56)  |  Expression (82)  |  Fashionable (6)  |  Field (119)  |  Generate (11)  |  Hypothesis (227)  |  Individual (177)  |  Limit (86)  |  Mathematics (587)  |  Obvious (54)  |  Quantum Electrodynamics (3)  |  Range (38)  |  Theoretical Physicist (12)  |  Think (205)  |  Truth (750)  |  Understand (189)  |  Variety (53)  |  View (115)  |  Viewpoint (6)

A man who is all theory is like “a rudderless ship on a shoreless sea.” ... Theories and speculations may be indulged in with safety only as long as they are based on facts that we can go back to at all times and know that we are on solid ground.
In Nature's Miracles: Familiar Talks on Science (1899), Vol. 1, Introduction, vii.
Science quotes on:  |  Base (43)  |  Fact (609)  |  Ground (63)  |  Knowledge (1128)  |  Man (345)  |  Rudder (3)  |  Safety (39)  |  Sea (143)  |  Ship (33)  |  Shore (11)  |  Solid (34)  |  Speculation (77)

A mathematical theory is not to be considered complete until you have made it so clear that you can explain it to the first man whom you meet on the street.
…...
Science quotes on:  |  Clear (52)  |  Complete (43)  |  Consider (45)  |  Explain (61)  |  First (174)  |  Mathematics (587)  |  Meet (16)  |  Street (17)

A metaphysical conclusion is either a false conclusion or a concealed experimental conclusion.
'On Thought in Medicine' (1877). Trans. E. Atkinson, Popular Lectures on Scientific Subjects (1881), 234.
Science quotes on:  |  Experiment (543)

A new theory is guilty until proven innocent, and the pre-existing theory innocent until proven guilty ... Continental drift was guilty until proven innocent.
The Nemesis Affair: A Story of the Death of the Dinosaurs and the Ways of Science (1986), 195-205.
Science quotes on:  |  Continental Drift (9)  |  Guilt (8)  |  Innocence (10)  |  New (340)  |  Pre-existing (2)  |  Proof (192)

A physical theory remains an empty shell until we have found a reasonable physical interpretation.
At the 4th Soviet Gravitational Conference, Minsk, USSR (Jul 1976). Quoted in Anton Z. Capri, From Quanta to Quarks: More Anecdotal History of Physics (2007), 120.
Science quotes on:  |  Empty (26)  |  Interpretation (61)  |  Physics (301)  |  Reasonableness (4)  |  Shell (35)

A principle of induction would be a statement with the help of which we could put inductive inferences into a logically acceptable form. In the eyes of the upholders of inductive logic, a principle of induction is of supreme importance for scientific method: “... this principle”, says Reichenbach, “determines the truth of scientific theories. To eliminate it from science would mean nothing less than to deprive science of the power to decide the truth or falsity of its theories. Without it, clearly, science would no longer have the right to distinguish its theories from the fanciful and arbitrary creations of the poet’s mind.” Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. Indeed, if there were such a thing as a purely logical principle of induction, there would be no problem of induction; for in this case, all inductive inferences would have to be regarded as purely logical or tautological transformations, just like inferences in inductive logic. Thus the principle of induction must be a synthetic statement; that is, a statement whose negation is not self-contradictory but logically possible. So the question arises why such a principle should be accepted at all, and how we can justify its acceptance on rational grounds.
…...
Science quotes on:  |  Accept (37)  |  Acceptable (5)  |  Acceptance (41)  |  Analytic (4)  |  Arbitrary (16)  |  Arise (32)  |  Case (64)  |  Clearly (17)  |  Creation (211)  |  Decide (25)  |  Deprive (9)  |  Determine (45)  |  Distinguish (32)  |  Eliminate (15)  |  Eye (159)  |  Falsity (12)  |  Fanciful (4)  |  Form (210)  |  Ground (63)  |  Help (68)  |  Importance (183)  |  Induction (45)  |  Inference (26)  |  Justify (19)  |  Less (54)  |  Logic (187)  |  Logical (20)  |  Long (95)  |  Mean (63)  |  Mind (544)  |  Negation (2)  |  Nothing (267)  |  Poet (59)  |  Possible (100)  |  Power (273)  |  Principle (228)  |  Problem (362)  |  Purely (15)  |  Question (315)  |  Rational (42)  |  Regard (58)  |  Right (144)  |  Say (126)  |  Science (1699)  |  Scientific (169)  |  Scientific Method (155)  |  Statement (56)  |  Supreme (24)  |  Synthetic (12)  |  Tautology (4)  |  Transformation (47)  |  Truth (750)

A scientifically unimportant discovery is one which, however true and however interesting for other reasons, has no consequences for a system of theory with which scientists in that field are concerned.
The Structure of Social Action (1937), Vol. 1, 7.
Science quotes on:  |  Concern (76)  |  Consequence (76)  |  Discovery (591)  |  Field (119)  |  Importance (183)  |  Interest (170)  |  Reason (330)  |  Scientist (447)  |  System (141)  |  Truth (750)

A taxonomy of abilities, like a taxonomy anywhere else in science, is apt to strike a certain type of impatient student as a gratuitous orgy of pedantry. Doubtless, compulsions to intellectual tidiness express themselves prematurely at times, and excessively at others, but a good descriptive taxonomy, as Darwin found in developing his theory, and as Newton found in the work of Kepler, is the mother of laws and theories.
From Intelligence: Its Structure, Growth and Action: Its Structure, Growth and Action (1987), 61.
Science quotes on:  |  Ability (75)  |  Compulsion (11)  |  Charles Darwin (284)  |  Descriptive (3)  |  Express (32)  |  Impatient (2)  |  Intellectual (79)  |  Johannes Kepler (72)  |  Law (418)  |  Mother (59)  |  Sir Isaac Newton (258)  |  Orgy (3)  |  Pedantry (5)  |  Premature (17)  |  Student (131)  |  Taxonomy (16)

A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.
As quoted in Antonina Vallentin, Einstein: A Biography (1954), 105. The author, a close friend of Einstein’s family, cites the quote only as “which he has recently made public.”
Science quotes on:  |  Birth (81)  |  Experiment (543)  |  Lead (101)  |  Path (59)  |  Proof (192)

A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant.
Manfred Eigen, 'The Origin of Biological Information', in Jagdish Mehra (ed.), The Physicists's Conception of Nature (1973), 618.
Science quotes on:  |  Alternative (22)  |  Irrelevant (5)  |  Model (64)  |  Right (144)  |  Wrong (116)

A theory is a supposition which we hope to be true, a hypothesis is a supposition which we expect to be useful; fictions belong to the realm of art; if made to intrude elsewhere, they become either make-believes or mistakes.
As quoted by William Ramsay, in 'Radium and Its Products', Harper’s Magazine (Dec 1904), 52. The first part, about suppositions, appears in a paper read by G. Johnson Stoney to the American Philosophical Society, Philadelphia (3 Apr 1903), printed in 'On the Dependence of What Apparently Takes Place in Nature Upon What Actually Occurs in the Universe of Real Existences', Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge (Apr-May 1903) 42, No. 173, 107. If you know a primary source for the part on fictions and mistakes, please contact Webmaster.
Science quotes on:  |  Art (205)  |  Belief (400)  |  Expect (27)  |  Fiction (16)  |  Hope (129)  |  Hypothesis (227)  |  Intrude (2)  |  Mistake (107)  |  Realm (40)  |  Science And Art (157)  |  Supposition (33)  |  True (120)  |  Useful (66)

A theory is scientific only if it can be disproved. But the moment you try to cover absolutely everything the chances are that you cover nothing.
From Assumption and Myth in Physical Theory (1967), 12.
Science quotes on:  |  Absolutely (24)  |  Chance (122)  |  Cover (23)  |  Disprove (15)  |  Everything (120)  |  Moment (61)  |  Nothing (267)  |  Scientific (169)  |  Try (103)

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended is its area of applicability. Therefore the deep impression which classical thermodynamics made upon me. It is the only physical theory of universal content concerning which I am convinced that within the framework of the applicability of its basic concepts, it will never be overthrown.
Autobiographical Notes (1946), 33. Quoted in Gerald Holton and Yehuda Elkana, Albert Einstein: Historical and Cultural Perspectives (1997), 227.
Science quotes on:  |  Applicability (2)  |  Area (18)  |  Basic (52)  |  Classical (11)  |  Concept (102)  |  Concern (76)  |  Content (39)  |  Convincing (9)  |  Difference (208)  |  Extension (20)  |  Framework (15)  |  Greater (36)  |  Impression (51)  |  Impressiveness (2)  |  Kind (99)  |  Overthrown (5)  |  Physical (94)  |  Premise (14)  |  Relation (96)  |  Simplicity (126)  |  Thermodynamics (27)  |  Universal (70)

A theory that you can’t explain to a bartender is probably no damn good.
…...
Science quotes on:  |  Damn (11)  |  Explain (61)  |  Good (228)  |  Probably (21)

A theory which cannot be mortally endangered cannot be alive.
Personal communication quoted by John R. Platt in 'Science, Strong Inference', Science (16 Oct 1964), 146, No. 3642, 349.
Science quotes on:  |  Alive (38)  |  Endanger (2)  |  Scientific Method (155)

A … difference between most system-building in the social sciences and systems of thought and classification of the natural sciences is to be seen in their evolution. In the natural sciences both theories and descriptive systems grow by adaptation to the increasing knowledge and experience of the scientists. In the social sciences, systems often issue fully formed from the mind of one man. Then they may be much discussed if they attract attention, but progressive adaptive modification as a result of the concerted efforts of great numbers of men is rare.
The Study of Man (1941), 19-20.
Science quotes on:  |  Knowledge (1128)  |  System (141)

About thirty years ago there was much talk that geologists ought only to observe and not theorise; and I well remember some one saying that at this rate a man might as well go into a gravel-pit and count the pebbles and describe the colours. How odd it is that anyone should not see that all observation must be for or against some view if it is to be of any service!
Letter to Henry Fawcett (18 Sep 1861). In Charles Darwin, Francis Darwin, Albert Charles Seward, More Letters of Charles Darwin (1903), Vol. 1, 195.
Science quotes on:  |  Color (78)  |  Count (34)  |  Description (72)  |  Geologist (42)  |  Gravel (3)  |  Observation (418)  |  Pebble (17)  |  Remember (53)  |  Service (54)  |  View (115)

According to the theory of aerodynamics, as may be readily demonstrated through wind tunnel experiments, the bumblebee is unable to fly. This is because the size, weight and shape of his body in relation to the total wingspread make flying impossible. But the bumblebee, being ignorant of these scientific truths, goes ahead and flies anyway—and makes a little honey every day.
Anonymous
Sign in a General Motors Corporation factory. As quoted in Ralph L. Woods, The Businessman's Book of Quotations (1951), 249-50. Cited in Suzy Platt (ed)., Respectfully Quoted: A Dictionary of Quotations (1989), 118.
Science quotes on:  |  Body (193)  |  Bumblebee (2)  |  Demonstrate (25)  |  Experiment (543)  |  Fly (65)  |  Flying (18)  |  Honey (5)  |  Ignorant (27)  |  Impossible (68)  |  Scientific Truth (2)  |  Shape (52)  |  Size (47)  |  Unable (12)  |  Weight (61)

After the discovery of spectral analysis no one trained in physics could doubt the problem of the atom would be solved when physicists had learned to understand the language of spectra. So manifold was the enormous amount of material that has been accumulated in sixty years of spectroscopic research that it seemed at first beyond the possibility of disentanglement. An almost greater enlightenment has resulted from the seven years of Röntgen spectroscopy, inasmuch as it has attacked the problem of the atom at its very root, and illuminates the interior. What we are nowadays hearing of the language of spectra is a true 'music of the spheres' in order and harmony that becomes ever more perfect in spite of the manifold variety. The theory of spectral lines will bear the name of Bohr for all time. But yet another name will be permanently associated with it, that of Planck. All integral laws of spectral lines and of atomic theory spring originally from the quantum theory. It is the mysterious organon on which Nature plays her music of the spectra, and according to the rhythm of which she regulates the structure of the atoms and nuclei.
Atombau und Spektrallinien (1919), viii, Atomic Structure and Spectral Lines, trans. Henry L. Brose (1923), viii.
Science quotes on:  |  Atom (251)  |  Atomic Theory (13)  |  Niels Bohr (50)  |  Discovery (591)  |  Harmony (55)  |  Integral (6)  |  Interior (13)  |  Language (155)  |  Music Of The Spheres (2)  |  Mystery (125)  |  Nature (1029)  |  Nucleus (30)  |  Order (167)  |  Perfection (71)  |  Max Planck (62)  |  Problem (362)  |  Quantum Theory (55)  |  Regulation (18)  |  Research (517)  |  Rhythm (12)  |  Wilhelm Röntgen (7)  |  Solution (168)  |  Spectral Analysis (2)  |  Spectral Line (3)  |  Spectroscopy (11)  |  Spectrum (23)  |  Structure (191)  |  Understanding (317)  |  Variety (53)

All good intellects have repeated, since Bacon’s time, that there can be no real knowledge but that which is based on observed facts. This is incontestable, in our present advanced stage; but, if we look back to the primitive stage of human knowledge, we shall see that it must have been otherwise then. If it is true that every theory must be based upon observed facts, it is equally true that facts cannot be observed without the guidance of some theory. Without such guidance, our facts would be desultory and fruitless; we could not retain them: for the most part we could not even perceive them.
The Positive Philosophy, trans. Harriet Martineau (1853), Vol. 1, 3-4.
Science quotes on:  |  Fact (609)

All interesting issues in natural history are questions of relative frequency, not single examples. Everything happens once amidst the richness of nature. But when an unanticipated phenomenon occurs again and again–finally turning into an expectation–then theories are overturned.
…...
Science quotes on:  |  Everything (120)  |  Example (57)  |  Expectation (46)  |  Finally (10)  |  Frequency (13)  |  Happen (63)  |  Interest (170)  |  Issue (37)  |  Natural History (44)  |  Nature (1029)  |  Occur (26)  |  Overturn (2)  |  Phenomenon (218)  |  Question (315)  |  Relative (24)  |  Richness (14)  |  Single (72)  |  Turn (72)  |  Unanticipated (2)

All science has one aim, namely, to find a theory of nature.
In Nature (1849), 2.
Science quotes on:  |  Aim (58)  |  Find (248)  |  Namely (10)  |  Nature (1029)  |  Science (1699)

All scientific theories are provisional and may be changed, but ... on the whole, they are accepted from Washington to Moscow because of their practical success. Where religion has opposed the findings of science, it has almost always had to retreat.
Essay 'Science Will Never Give Us the Answers to All Our Questions', collected in Henry Margenau, and Roy Abraham Varghese (eds.), Cosmos, Bios, Theos (1992), 65.
Science quotes on:  |  Accepted (5)  |  Change (291)  |  Findings (3)  |  Moscow (3)  |  Opposed (2)  |  Practical (93)  |  Provisional (4)  |  Religion (210)  |  Retreat (9)  |  Science (1699)  |  Science And Religion (267)  |  Scientific (169)  |  Success (202)  |  Washington (5)

All that stuff I was taught about evolution, embryology, Big Bang theory, all that is lies straight from the pit of hell. It’s lies to try to keep me and all the folks who are taught that from understanding that they need a savior.
[Revealing his anti-science views, contrary to the qualifications needed to make important public policy on matters of science.]
From speech (27 Sep 2012) to a sportman's banquet at Liberty Baptist Church, Hartwell, Georgia, as quoted in Matt Pearce, 'U.S. Rep. Paul Broun: Evolution a lie ‘from the pit of hell’', Los angeles Times (7 Oct 2012).
Science quotes on:  |  Big Bang (38)  |  Embryology (16)  |  Evolution (482)  |  Hell (29)  |  Lie (80)  |  Pit (10)  |  Savior (3)  |  Science And Religion (267)  |  Understanding (317)

Almost everyone... seems to be quite sure that the differences between the methodologies of history and of the natural sciences are vast. For, we are assured, it is well known that in the natural sciences we start from observation and proceed by induction to theory. And is it not obvious that in history we proceed very differently? Yes, I agree that we proceed very differently. But we do so in the natural sciences as well.
In both we start from myths—from traditional prejudices, beset with error—and from these we proceed by criticism: by the critical elimination of errors. In both the role of evidence is, in the main, to correct our mistakes, our prejudices, our tentative theories—that is, to play a part in the critical discussion, in the elimination of error. By correcting our mistakes, we raise new problems. And in order to solve these problems, we invent conjectures, that is, tentative theories, which we submit to critical discussion, directed towards the elimination of error.
The Myth of the Framework: In Defence of Science and Rationality (1993), 140.
Science quotes on:  |  Conjecture (22)  |  Correction (28)  |  Criticism (52)  |  Difference (208)  |  Discussion (37)  |  Elimination (17)  |  Error (230)  |  Everyone (20)  |  Evidence (157)  |  History (302)  |  Induction (45)  |  Methodology (8)  |  Mistake (107)  |  Myth (43)  |  Natural Science (62)  |  Observation (418)  |  Prejudice (58)  |  Problem (362)  |  Tradition (43)

And yet I think that the Full House model does teach us to treasure variety for its own sake–for tough reasons of evolutionary theory and nature’s ontology, and not from a lamentable failure of thought that accepts all beliefs on the absurd rationale that disagreement must imply disrespect. Excellence is a range of differences, not a spot. Each location on the range can be occupied by an excellent or an inadequate representative– and we must struggle for excellence at each of these varied locations. In a society driven, of ten unconsciously, to impose a uniform mediocrity upon a former richness of excellence–where McDonald’s drives out the local diner, and the mega-Stop & Shop eliminates the corner Mom and Pop–an understanding and defense of full ranges as natural reality might help to stem the tide and preserve the rich raw material of any evolving system: variation itself.
…...
Science quotes on:  |  Absurd (20)  |  Accept (37)  |  Belief (400)  |  Corner (24)  |  Defense (15)  |  Difference (208)  |  Disagreement (11)  |  Disrespect (2)  |  Drive (38)  |  Eliminate (15)  |  Evolution (482)  |  Evolutionary (16)  |  Excellence (28)  |  Excellent (15)  |  Failure (118)  |  Former (18)  |  Full (38)  |  Help (68)  |  House (36)  |  Imply (12)  |  Impose (17)  |  Inadequate (13)  |  Lamentable (3)  |  Local (15)  |  Location (5)  |  Material (124)  |  Mediocrity (8)  |  Model (64)  |  Natural (128)  |  Nature (1029)  |  Occupy (18)  |  Pop (2)  |  Preserve (38)  |  Range (38)  |  Rationale (5)  |  Raw (10)  |  Reality (140)  |  Reason (330)  |  Representative (9)  |  Rich (48)  |  Richness (14)  |  Sake (17)  |  Shop (11)  |  Society (188)  |  Spot (11)  |  Stem (11)  |  Struggle (60)  |  System (141)  |  Teach (102)  |  Think (205)  |  Thought (374)  |  Tide (18)  |  Tough (8)  |  Treasure (35)  |  Unconsciously (3)  |  Understand (189)  |  Uniform (14)  |  Variation (50)  |  Variety (53)  |  Vary (14)

Any one whose disposition leads him to attach more weight to unexplained difficulties than to the explanation of facts will certainly reject my theory.
The Origin of Species (1859), 482.
Science quotes on:  |  Attachment (5)  |  Certainty (97)  |  Difficulty (113)  |  Disposition (14)  |  Explanation (161)  |  Fact (609)  |  Rejection (24)  |  Unexplained (2)  |  Weight (61)

Any theory is better than no theory.
In Barry G. Firkin, Judith A. Whitworth, Dictionary of Medical Eponyms (1996), 5.

Anyone who has examined into the history of the theories of earth evolution must have been astounded to observe the manner in which the unique and the difficultly explainable has been made to take the place of the common and the natural in deriving the framework of these theories.
Earth Evolution and Facial Expression (1921), 174.
Science quotes on:  |  Earth (487)  |  Geology (187)

Architects who have aimed at acquiring manual skill without scholarship have never been able to reach a position of authority to correspond to their pains, while those who relied only upon theories and scholarship were obviously hunting the shadow, not the substance. But those who have a thorough knowledge of both, like men armed at all points, have the sooner attained their object and carried authority with them.
Vitruvius
In De Architectura, Book 1, Chap 1, Sec. 2. As translated in Morris Hicky Morgan (trans.), Vitruvius: The Ten Books on Architecture (1914), 3.
Science quotes on:  |  Architect (15)  |  Attainment (35)  |  Authority (50)  |  Education (280)  |  Knowledge (1128)  |  Manual (7)  |  Rely (6)  |  Scholarship (13)  |  Shadow (35)  |  Skill (50)  |  Substance (73)  |  Thorough (7)

As every circumstance relating to so capital a discovery as this (the greatest, perhaps, that has been made in the whole compass of philosophy, since the time of Sir Isaac Newton) cannot but give pleasure to all my readers, I shall endeavour to gratify them with the communication of a few particulars which I have from the best authority. The Doctor [Benjamin Franklin], after having published his method of verifying his hypothesis concerning the sameness of electricity with the matter lightning, was waiting for the erection of a spire in Philadelphia to carry his views into execution; not imagining that a pointed rod, of a moderate height, could answer the purpose; when it occurred to him, that, by means of a common kite, he could have a readier and better access to the regions of thunder than by any spire whatever. Preparing, therefore, a large silk handkerchief, and two cross sticks, of a proper length, on which to extend it, he took the opportunity of the first approaching thunder storm to take a walk into a field, in which there was a shed convenient for his purpose. But dreading the ridicule which too commonly attends unsuccessful attempts in science, he communicated his intended experiment to no body but his son, who assisted him in raising the kite.
The kite being raised, a considerable time elapsed before there was any appearance of its being electrified. One very promising cloud passed over it without any effect; when, at length, just as he was beginning to despair of his contrivance, he observed some loose threads of the hempen string to stand erect, and to avoid one another, just as if they had been suspended on a common conductor. Struck with this promising appearance, he inmmediately presented his knuckle to the key, and (let the reader judge of the exquisite pleasure he must have felt at that moment) the discovery was complete. He perceived a very evident electric spark. Others succeeded, even before the string was wet, so as to put the matter past all dispute, and when the rain had wetted the string, he collected electric fire very copiously. This happened in June 1752, a month after the electricians in France had verified the same theory, but before he had heard of any thing that they had done.
The History and Present State of Electricity, with Original Experiments (1767, 3rd ed. 1775), Vol. 1, 216-7.
Science quotes on:  |  Cloud (44)  |  Conductor (8)  |  Discovery (591)  |  Electrician (3)  |  Electricity (121)  |  Fire (117)  |  France (21)  |  Benjamin Franklin (81)  |  Hypothesis (227)  |  Key (38)  |  Kite (2)  |  Lightning (28)  |  Philadelphia (3)  |  Spark (18)  |  Spire (4)  |  String (17)  |  Thunder (11)  |  Verification (20)

As far as I see, such a theory [of the primeval atom] remains entirely outside any metaphysical or religious question. It leaves the materialist free to deny any transcendental Being. He may keep, for the bottom of space-time, the same attitude of mind he has been able to adopt for events occurring in non-singular places in space-time. For the believer, it removes any attempt to familiarity with God, as were Laplace's chiquenaude or Jeans' finger. It is consonant with the wording of Isaiah speaking of the 'Hidden God' hidden even in the beginning of the universe ... Science has not to surrender in face of the Universe and when Pascal tries to infer the existence of God from the supposed infinitude of Nature, we may think that he is looking in the wrong direction.
'The Primeval atom Hypothesis and the Problem of Clusters of Galaxies', in R. Stoops (ed.), La Structure et l'Evolution de l'Univers (1958), 1-32. Trans. Helge Kragh, Cosmology and Controversy: The Historical Development of Two Theories of the Universe (1996), 60.
Science quotes on:  |  Atom (251)  |  Attitude (47)  |  Belief (400)  |  Bible (83)  |  Event (97)  |  Existence (254)  |  God (454)  |  Infinity (59)  |  Sir James Jeans (30)  |  Pierre-Simon Laplace (50)  |  Materialist (4)  |  Metaphysics (30)  |  Blaise Pascal (36)  |  Religion (210)  |  Space-Time (14)  |  Transcendental (3)  |  Universe (563)

As is well known the principle of virtual velocities transforms all statics into a mathematical assignment, and by D'Alembert's principle for dynamics, the latter is again reduced to statics. Although it is is very much in order that in gradual training of science and in the instruction of the individual the easier precedes the more difficult, the simple precedes the more complicated, the special precedes the general, yet the min, once it has arrived at the higher standpoint, demands the reverse process whereby all statics appears only as a very special case of mechanics.
Collected Works (1877), Vol. 5, 25-26. Quoted in G. Waldo Dunnington, Carl Friedrich Gauss: Titan of Science (2004), 412.
Science quotes on:  |  Jean le Rond D’Alembert (6)  |  Mechanics (44)  |  Statics (4)

As soon … as it was observed that the stars retained their relative places, that the times of their rising and setting varied with the seasons, that sun, moon, and planets moved among them in a plane, … then a new order of things began.… Science had begun, and the first triumph of it was the power of foretelling the future; eclipses were perceived to recur in cycles of nineteen years, and philosophers were able to say when an eclipse was to be looked for. The periods of the planets were determined. Theories were invented to account for their eccentricities; and, false as those theories might be, the position of the planets could be calculated with moderate certainty by them.
Lecture delivered to the Royal Institution (5 Feb 1864), 'On the Science of History'. Collected in Notices of the Proceedings at the Meetings of the Members of the Royal Institution of Great Britain with Abstracts of the Discourses (1866), Vol. 4, 187.
Science quotes on:  |  Beginning (114)  |  Calculation (67)  |  Cycle (26)  |  Eclipse (16)  |  Foretelling (4)  |  Future (229)  |  Moon (132)  |  Observation (418)  |  Period (49)  |  Plane (15)  |  Planet (199)  |  Power (273)  |  Recurring (2)  |  Science (1699)  |  Season (24)  |  Star (251)  |  Sun (211)  |  Triumph (33)

As usual, nature’s imagination far surpasses our own, as we have seen from the other theories which are subtle and deep.
In The Character of Physical Law (1965, 2001), 162.
Science quotes on:  |  Deep (81)  |  Imagination (209)  |  Nature (1029)  |  Subtle (26)  |  Surpassing (7)

Astronomy was thus the cradle of the natural sciences and the starting point of geometrical theories. The stars themselves gave rise to the concept of a ‘point’; triangles, quadrangles and other geometrical figures appeared in the constellations; the circle was realized by the disc of the sun and the moon. Thus in an essentially intuitive fashion the elements of geometrical thinking came into existence.
In George Edward Martin, The Foundations of Geometry and the Non-Euclidean Plane (1982), 72.
Science quotes on:  |  Appear (55)  |  Astronomy (175)  |  Circle (28)  |  Concept (102)  |  Constellation (9)  |  Cradle (10)  |  Element (129)  |  Essentially (11)  |  Existence (254)  |  Fashion (24)  |  Figure (32)  |  Geometrical (3)  |  Give (117)  |  Intuitive (7)  |  Moon (132)  |  Natural Sciences (3)  |  Point (72)  |  Quadrangle (2)  |  Realize (43)  |  Rise (51)  |  Star (251)  |  Starting Point (6)  |  Sun (211)  |  Themselves (45)  |  Think (205)  |  Triangle (7)

Astrophysicists closing in on the grand structure of matter and emptiness in the universe are ruling out the meatball theory, challenging the soap bubble theory, and putting forward what may be the strongest theory of all: that the cosmos is organized like a sponge.
'Rethinking Clumps and Voids in the Universe', New York Times (9 Nov 1986), A1.
Science quotes on:  |  Astrophysicist (7)  |  Bubble (12)  |  Challenge (37)  |  Cosmos (39)  |  Emptiness (6)  |  Matter (270)  |  Organized (9)  |  Sponge (9)  |  Strong (47)  |  Structure (191)  |  Universe (563)

Be suspicious of a theory if more and more hypotheses are needed to support it as new facts become available, or as new considerations are brought to bear.
Given as the authors’ preferred interpretation of Ockham’s Razor. With co-author Nalin Chandra Wickramasinghe, Evolution from Space (1981), 135.
Science quotes on:  |  Available (18)  |  Consideration (65)  |  Fact (609)  |  Hypothesis (227)  |  Need (211)  |  New (340)  |  Ockham’s Razor (2)  |  Support (63)  |  Suspicious (3)

Besides electrical engineering theory of the transmission of messages, there is a larger field [cybernetics] which includes not only the study of language but the study of messages as a means of controlling machinery and society, the development of computing machines and other such automata, certain reflections upon psychology and the nervous system, and a tentative new theory of scientific method.
In Cybernetics (1948).
Science quotes on:  |  Automaton (6)  |  Computer (84)  |  Control (93)  |  Cybernetic (2)  |  Development (228)  |  Electricity (121)  |  Engineering (115)  |  Language (155)  |  Machine (133)  |  Message (30)  |  Psychology (125)  |  Reflection (50)  |  Society (188)  |  Study (331)  |  Tentative (7)  |  Transmission (23)

Biological determinism is, in its essence, a theory of limits. It takes the current status of groups as a measure of where they should and must be ... We inhabit a world of human differences and predilections, but the extrapolation of these facts to theories of rigid limits is ideology.
The Mismeasure of Man (1981), 28-9.
Science quotes on:  |  Biology (150)  |  Fact (609)  |  Ideology (7)

Buffon, who, with all his theoretical ingenuity and extraordinary eloquence, I suspect had little actual information in the science on which he wrote so admirably For instance, he tells us that the cow sheds her horns every two years; a most palpable error. ... It is wonderful that Buffon who lived so much in the country at his noble seat should have fallen into such a blunder I suppose he has confounded the cow with the deer.
In The Life of Samuel Johnson, LL.D. (1826), Vol. 3, 70, footnote.
Science quotes on:  |  Admirable (11)  |  Blunder (13)  |  Buffon_Georges (2)  |  Confounding (3)  |  Country (121)  |  Cow (27)  |  Deer (6)  |  Eloquence (5)  |  Error (230)  |  Horn (10)  |  Information (102)  |  Ingenuity (27)  |  Shed (5)  |  Suspicion (25)  |  Telling (23)  |  Writing (72)

But although in theory physicists realize that their conclusions are ... not certainly true, this ... does not really sink into their consciousness. Nearly all the time ... they ... act as if Science were indisputably True, and what's more, as if only science were true.... Any information obtained otherwise than by the scientific method, although it may be true, the scientists will call “unscientific,” using this word as a smear word, by bringing in the connotation from its original [Greek] meaning, to imply that the information is false, or at any rate slightly phony.
In Science is a Sacred Cow (1950), 176-77.
Science quotes on:  |  Conclusion (120)  |  False (79)  |  Phony (3)  |  Physicist (130)  |  Scientific Method (155)  |  Smear (2)  |  Truth (750)  |  Unscientific (7)

But no other theory can explain so much. Continental drift is without a cause or a physical theory. It has never been applied to any but the last part of geological time.
In 'Geophysics and Continental Growth', American Scientist, 1959, 47, 23.
Science quotes on:  |  Cause (231)  |  Continental Drift (9)  |  Explanation (161)  |  Geology (187)  |  Plate Tectonics (20)  |  Time (439)

But, contrary to the lady’s prejudices about the engineering profession, the fact is that quite some time ago the tables were turned between theory and applications in the physical sciences. Since World War II the discoveries that have changed the world are not made so much in lofty halls of theoretical physics as in the less-noticed labs of engineering and experimental physics. The roles of pure and applied science have been reversed; they are no longer what they were in the golden age of physics, in the age of Einstein, Schrödinger, Fermi and Dirac.
'The Age of Computing: a Personal Memoir', Daedalus (1992), 121, 120.
Science quotes on:  |  Application (117)  |  Applied Science (28)  |  Paul A. M. Dirac (43)  |  Discovery (591)  |  Albert Einstein (535)  |  Engineer (72)  |  Fact (609)  |  Enrico Fermi (17)  |  Golden Age (5)  |  Laboratory (120)  |  Physical Science (54)  |  Physics (301)  |  Prejudice (58)  |  Profession (54)  |  Pure Science (18)  |  Reverse (14)  |  Role (35)  |  Erwin Schrödinger (65)  |  Theoretical Physics (15)  |  World War II (7)

By an application of the theory of relativity to the taste of readers, today in Germany I am called a German man of science, and in England I am represented as a Swiss Jew. If I come to be regarded as a bête noire the descriptions will be reversed, and I shall become a Swiss Jew for the Germans and a German man of science for the English!
Times (28 Nov 1919). In Robert Andrews Famous Lines: a Columbia Dictionary of Familiar Quotations (1997), 414. Variations of this quote were made by Einstein on other occasions.
Science quotes on:  |  Application (117)  |  Description (72)  |  England (31)  |  Germany (9)  |  Jew (9)  |  Men Of Science (97)  |  Nationality (2)  |  Reader (22)  |  Relativity (50)  |  Reverse (14)  |  Swiss (2)

Chaos theory is a new theory invented by scientists panicked by the thought that the public were beginning to understand the old ones.
John Mitchinson and John Lloyd, If Ignorance Is Bliss, Why Aren't There More Happy People?: Smart Quotes for Dumb Times (2009), 273.
Science quotes on:  |  Begin (52)  |  Chaos Theory (4)  |  Invent (30)  |  New (340)  |  Old (104)  |  Public (82)  |  Scientist (447)  |  Thought (374)  |  Understand (189)

Chemistry and physics are experimental sciences; and those who are engaged in attempting to enlarge the boundaries of science by experiment are generally unwilling to publish speculations; for they have learned, by long experience, that it is unsafe to anticipate events. It is true, they must make certain theories and hypotheses. They must form some kind of mental picture of the relations between the phenomena which they are trying to investigate, else their experiments would be made at random, and without connection.
From 'Radium and Its Products', Harper’s Magazine (Dec 1904), 52.
Science quotes on:  |  Anticipate (8)  |  Boundary (27)  |  Chemistry (239)  |  Connection (86)  |  Enlarge (15)  |  Event (97)  |  Experience (268)  |  Experiment (543)  |  Hypothesis (227)  |  Investigation (123)  |  Mental (57)  |  Phenomenon (218)  |  Physics (301)  |  Picture (55)  |  Publish (18)  |  Random (21)  |  Relation (96)  |  Science (1699)  |  Speculation (77)  |  Unsafe (5)  |  Unwilling (4)

Chemistry is like a majestic skyscraper. The concrete secure foundation of chemistry consists of countless experimentally observed facts. The theories, principles and laws developed from these observations are like an elevator which runs from the bottom to the top of the edifice.
Ernest R. Toon and George L. Ellis (eds.), Foundations of Chemistry (1968), 1.
Science quotes on:  |  Bottom (28)  |  Chemistry (239)  |  Concrete (21)  |  Consist (22)  |  Countless (13)  |  Developed (8)  |  Edifice (13)  |  Elevator (2)  |  Experiment (543)  |  Fact (609)  |  Foundation (75)  |  Law (418)  |  Majestic (7)  |  Observation (418)  |  Principle (228)  |  Secure (13)  |  Skyscraper (6)  |  Top (20)

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.
Quoted in Albert Einstein and Stephen Hawking (ed.), A Stubbornly Persistent Illusion (2007), 353.
Science quotes on:  |  Thermodynamics (27)

Considered in its entirety, psychoanalysis won’t do. It is an end product, moreover, like a dinosaur or a zeppelin, no better theory can ever be erected on its ruins, which will remain for ever one of the saddest and strangest of all landmarks in the history of twentieth century thought.
From 'Further Comments on Psychoanalysis', The Hope of Progress: A Scientist Looks at Problems in Philosophy, Literature and Science (1973), 69.
Science quotes on:  |  20th Century (25)  |  Better (131)  |  Considering (6)  |  Dinosaur (23)  |  Entirety (3)  |  Erected (2)  |  History (302)  |  Landmark (6)  |  Psychoanalysis (37)  |  Remain (77)  |  Ruin (23)  |  Sadness (26)  |  Strangest (4)  |  Thought (374)  |  Zeppelin (4)

Cosmology, for centuries consisting of speculation based on a minimum of observational evidence and a maximum of philosophical predilection, became in the twentieth century an observational science, its theories now subject to verification or refutation to a degree previously unimaginable.
Opening sentence in 'Philosophical Values and Observation in Edwin Hubble's Choice of a Model of the Universe', Historical Studies in the Physical Sciences (1982), 13, No. 1, 41.
Science quotes on:  |  20th Century (25)  |  Century (94)  |  Cosmology (17)  |  Evidence (157)  |  Maximum (9)  |  Minimum (10)  |  Observation (418)  |  Philosophy (213)  |  Predilection (2)  |  Refutation (10)  |  Speculation (77)  |  Unimaginable (4)  |  Verification (20)

Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a mountain, gaining new and wider views, discovering unexpected connections between our starting point and its rich environment. But the point from which we started out still exists and can be seen, although it appears smaller and forms a tiny part of our broad view gained by the mastery of the obstacles on our adventurous way up.
Science quotes on:  |  Adventure (36)  |  Barn (4)  |  Climb (14)  |  Connection (86)  |  Create (98)  |  Destroy (63)  |  Discover (115)  |  Erect (3)  |  Gain (48)  |  Mastery (20)  |  Mountain (111)  |  New (340)  |  Obstacle (21)  |  Old (104)  |  Skyscraper (6)  |  Starting Point (6)  |  Unexpected (26)  |  View (115)  |  Wide (14)

Dalton transformed the atomic concept from a philosophical speculation into a scientific theory—framed to explain quantitative observations, suggesting new tests and experiments, and capable of being given quantitative form through the establishment of relative masses of atomic particles.
Development of Concepts of Physics. In Clifford A. Pickover, Archimedes to Hawking: Laws of Science and the Great Minds Behind Them (2008), 175.
Science quotes on:  |  Atomic (3)  |  Capable (26)  |  Concept (102)  |  Establishment (29)  |  Experiment (543)  |  Explain (61)  |  Form (210)  |  Frame (17)  |  Give (117)  |  Mass (61)  |  New (340)  |  Observation (418)  |  Particle (90)  |  Philosophical (14)  |  Quantitative (15)  |  Relative (24)  |  Scientific (169)  |  Speculation (77)  |  Suggest (15)  |  Test (96)  |  Transform (20)

Darwin's theory was received in Russia with profound sympathy. While in Western Europe it met firmly established old traditions which it had first to overcome, in Russia its appearance coincided with the awakening of our society after the Crimean War and here it immediately received the status of full citizenship and ever since has enjoyed widespread popularity.
Quoted in Thomas F. Glick (ed.), The Comparative Reception of Darwinism (1988), 229-30.
Science quotes on:  |  Charles Darwin (284)  |  Russia (9)

Do not say hypothesis, and even less theory: say way of thinking.
Aphorism 263 in Notebook J (1789-1793), as translated by R. J. Hollingdale in Aphorisms (1990). Reprinted as The Waste Books (2000), 181.
Science quotes on:  |  Hypothesis (227)  |  French Saying (61)  |  Thinking (222)

Do you see this egg? With this you can topple every theological theory, every church or temple in the world.
'Conversation Between d'Alembert and Diderot,' D'Alembert's Dream (written 1769, published 1830). Reprinted in Selected Writings, ed. Lester G. Crocker (1966).
Science quotes on:  |  Church (30)  |  Egg (41)  |  Temple (22)  |  Theology (35)  |  World (667)

Don’t confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.
Martin H. Fischer, Howard Fabing (ed.) and Ray Marr (ed.), Fischerisms (1944), 7.
Science quotes on:  |  Confusion (34)  |  Correct (53)  |  Establishment (29)  |  Explanation (161)  |  Hypothesis (227)  |  Possibility (96)  |  Purpose (138)  |  Purpose Of Science (4)  |  Science (1699)

During my stay in London I resided for a considerable time in Clapham Road in the neighbourhood of Clapham Common... One fine summer evening I was returning by the last bus 'outside' as usual, through the deserted streets of the city, which are at other times so full of life. I fell into a reverie (Träumerei), and 10, the atoms were gambolling before my eyes! Whenever, hitherto, these diminutive beings had appeared to me, they had always been in motion: but up to that time I had never been able to discern the nature of their motion. Now, however, I saw how, frequently, two smaller atoms united to form a pair: how the larger one embraced the two smaller ones: how still larger ones kept hold of three or even four of the smaller: whilst the whole kept whirling in a giddy dance. I saw how the larger ones formed a chain, dragging the smaller ones after them but only at the ends of the chain. I saw what our past master, Kopp, my highly honoured teacher and friend has depicted with such charm in his Molekular-Welt: but I saw it long before him. The cry of the conductor 'Clapham Road', awakened me from my dreaming: but I spent part of the night in putting on paper at least sketches of these dream forms. This was the origin of the 'Structural Theory'.
Kekule at Benzolfest in Berichte (1890), 23, 1302.
Science quotes on:  |  Chain (38)  |  Compound (53)  |  Hermann Franz Moritz Kopp (2)  |  Structure (191)

Each worldview was a cultural product, but evolution is true and separate creation is not ... Worldviews are social constructions, and they channel the search for facts. But facts are found and knowledge progresses, however fitfully. Fact and theory are intertwined, and all great scientists understand the interaction.
…...
Science quotes on:  |  Channel (17)  |  Construction (69)  |  Creation (211)  |  Cultural (16)  |  Evolution (482)  |  Fact (609)  |  Find (248)  |  Fitfully (2)  |  Great (300)  |  Interaction (28)  |  Intertwine (3)  |  Knowledge (1128)  |  Product (72)  |  Progress (317)  |  Scientist (447)  |  Search (85)  |  Separate (46)  |  Social (93)  |  True (120)  |  Understand (189)  |  Worldview (5)

Earlier theories … were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past. [Coining the “big bang” expression.]
From microfilmed Speaker's Copy of a radio script held at the BBC Written Archive Centre, for Hoyle's radio talk on the BBC Third Programme (28 Mar 1949). The date and time of the broadcast, 6:30pm, are given in that week’s Radio Times. The quote, with these references given in footnotes, in Simon Mitton, Fred Hoyle: A Life in Science (2011), 127-128 and 332. The text of the talk, the first printed use of the “big bang” expression, in the BBC’s The Listener magazine (7 Apr 1949), Vol.41, 568.
Science quotes on:  |  Big Bang (38)  |  Creation (211)  |  Early (39)  |  Hypothesis (227)  |  Matter (270)  |  Nomenclature (129)  |  Universe (563)

Electric and magnetic forces. May they live for ever, and never be forgot, if only to remind us that the science of electromagnetics, in spite of the abstract nature of its theory, involving quantities whose nature is entirely unknown at the present, is really and truly founded on the observations of real Newtonian forces, electric and magnetic respectively.
From 'Electromagnetic Theory, CXII', The Electrician (23 Feb 1900), Vol. 44, 615.
Science quotes on:  |  Abstract (43)  |  Electricity (121)  |  Electromagnetism (17)  |  Force (194)  |  Forgetting (13)  |  Life (917)  |  Magnetism (26)  |  Nature (1029)  |  Observation (418)  |  Quantity (35)  |  Reminder (11)  |  Unknown (87)

Engineering is the art of directing the great sources of power in nature for the use and the convenience of people. In its modern form engineering involves people, money, materials, machines, and energy. It is differentiated from science because it is primarily concerned with how to direct to useful and economical ends the natural phenomena which scientists discover and formulate into acceptable theories. Engineering therefore requires above all the creative imagination to innovate useful applications of natural phenomena. It seeks newer, cheaper, better means of using natural sources of energy and materials.
In McGraw Hill, Science and Technology Encyclopedia
Science quotes on:  |  Acceptable (5)  |  Application (117)  |  Art (205)  |  Better (131)  |  Cheaper (5)  |  Concern (76)  |  Convenience (25)  |  Creative (41)  |  Differentiate (6)  |  Direct (44)  |  Directing (5)  |  Discover (115)  |  Economical (7)  |  End (141)  |  Energy (185)  |  Engineering (115)  |  Form (210)  |  Formulate (10)  |  Great (300)  |  Imagination (209)  |  Involve (27)  |  Machine (133)  |  Material (124)  |  Means (109)  |  Modern (104)  |  Money (125)  |  Natural (128)  |  Nature (1029)  |  Person (114)  |  Phenomena (8)  |  Power (273)  |  Primarily (9)  |  Require (33)  |  Science (1699)  |  Scientist (447)  |  Seek (57)  |  Source (71)  |  Useful (66)

Engineers apply the theories and principles of science and mathematics to research and develop economical solutions to practical technical problems. Their work is the link between scientific discoveries and commercial applications. Engineers design products, the machinery to build those products, the factories in which those products are made, and the systems that ensure the quality of the product and efficiency of the workforce and manufacturing process. They design, plan, and supervise the construction of buildings, highways, and transit systems. They develop and implement improved ways to extract, process, and use raw materials, such as petroleum and natural gas. They develop new materials that both improve the performance of products, and make implementing advances in technology possible. They harness the power of the sun, the earth, atoms, and electricity for use in supplying the Nation’s power needs, and create millions of products using power. Their knowledge is applied to improving many things, including the quality of health care, the safety of food products, and the efficient operation of financial systems.
Bureau of Labor Statistics, Occupational Outlook Handbook (2000) as quoted in Charles R. Lord. Guide to Information Sources in Engineering (2000), 5. This definition has been revised and expanded over time in different issues of the Handbook.
Science quotes on:  |  Advance (123)  |  Application (117)  |  Applied (15)  |  Atom (251)  |  Build (80)  |  Building (51)  |  Commercial (25)  |  Construction (69)  |  Create (98)  |  Design (92)  |  Develop (55)  |  Discovery (591)  |  Earth (487)  |  Economical (7)  |  Efficiency (25)  |  Efficient (20)  |  Electricity (121)  |  Engineer (72)  |  Ensure (8)  |  Extract (13)  |  Factory (13)  |  Finance (2)  |  Food (139)  |  Harness (15)  |  Health Care (7)  |  Highway (10)  |  Implement (5)  |  Improvement (67)  |  Knowledge (1128)  |  Machinery (25)  |  Manufacturing (21)  |  Material (124)  |  Mathematics (587)  |  Million (89)  |  Nation (111)  |  Natural Gas (2)  |  Need (211)  |  Operation (96)  |  Performance (27)  |  Petroleum (7)  |  Plan (69)  |  Power (273)  |  Practical (93)  |  Principle (228)  |  Problem (362)  |  Process (201)  |  Product (72)  |  Quality (65)  |  Raw (10)  |  Research (517)  |  Safety (39)  |  Science (1699)  |  Scientific (169)  |  Solution (168)  |  Sun (211)  |  Supervise (2)  |  System (141)  |  Technical (26)  |  Technology (199)  |  Using (6)

Entropy theory is indeed a first attempt to deal with global form; but it has not been dealing with structure. All it says is that a large sum of elements may have properties not found in a smaller sample of them.
In Entropy and Art: An Essay on Disorder and Order (1974), 21.
Science quotes on:  |  Attempt (94)  |  Deal (25)  |  Element (129)  |  Entropy (40)  |  First (174)  |  Form (210)  |  Global (14)  |  Large (82)  |  Property (96)  |  Sample (8)  |  French Saying (61)  |  Smaller (4)  |  Structure (191)  |  Sum (30)

Entropy theory, on the other hand, is not concerned with the probability of succession in a series of items but with the overall distribution of kinds of items in a given arrangement.
In Entropy and Art: An Essay on Disorder and Order (1974), 19.
Science quotes on:  |  Arrangement (45)  |  Concern (76)  |  Distribution (21)  |  Entropy (40)  |  Given (4)  |  Kind (99)  |  Other Hand (2)  |  Overall (3)  |  Probability (83)  |  Series (38)  |  Succession (39)

Even in the dark times between experimental breakthroughs, there always continues a steady evolution of theoretical ideas, leading almost imperceptibly to changes in previous beliefs.
In Nobel Lecture (8 Dec 1989), 'Conceptual Foundations of the Unified Theory of Weak and Electromagnetic Interactions.'
Science quotes on:  |  Belief (400)  |  Breakthrough (13)  |  Change (291)  |  Dark (49)  |  Evolution (482)  |  Experiment (543)  |  Idea (440)  |  Imperceptible (5)  |  Previous (8)  |  Theorist (24)  |  Time (439)

Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry by pursuing chimerical problems and theories which are false. In physical science, which is more advanced than biology, we might still cite men of science who make great discoveries by relying on false theories. It seems, indeed, a necessary weakness of our mind to be able to reach truth only across a multitude of errors and obstacles.
An Introduction to the Study of Experimental Medicine (1865, translation 1927, 1957), 170.
Science quotes on:  |  Advance (123)  |  Alchemist (14)  |  Biology (150)  |  Chemistry (239)  |  Chimera (5)  |  Cite (5)  |  Discovery (591)  |  Error (230)  |  False (79)  |  Hypothesis (227)  |  Lead (101)  |  Men Of Science (97)  |  Mind (544)  |  Mistake (107)  |  Multitude (14)  |  Necessary (89)  |  Obstacle (21)  |  Physical Science (54)  |  Problem (362)  |  Pursuit (55)  |  Reach (68)  |  Reliance (9)  |  Truth (750)  |  Weakness (31)

Every discovery opens a new field for investigation of facts, shows us the imperfection of our theories. It has justly been said, that the greater the circle of light, the greater the boundary of darkness by which it is surrounded.
Humphry Davy and John Davy, 'Consolations in Travel--Dialogue V--The Chemical Philosopher', The Collected Works of Sir Humphry Davy (1840), Vol. 9, 362.
Science quotes on:  |  Discovery (591)  |  Fact (609)  |  Research (517)

Every new theory as it arises believes in the flush of youth that it has the long sought goal; it sees no limits to its applicability, and believes that at last it is the fortunate theory to achieve the 'right' answer. This was true of electron theory—perhaps some readers will remember a book called The Electrical Theory of the Universe by de Tunzelman. It is true of general relativity theory with its belief that we can formulate a mathematical scheme that will extrapolate to all past and future time and the unfathomed depths of space. It has been true of wave mechanics, with its first enthusiastic claim a brief ten years ago that no problem had successfully resisted its attack provided the attack was properly made, and now the disillusionment of age when confronted by the problems of the proton and the neutron. When will we learn that logic, mathematics, physical theory, are all only inventions for formulating in compact and manageable form what we already know, like all inventions do not achieve complete success in accomplishing what they were designed to do, much less complete success in fields beyond the scope of the original design, and that our only justification for hoping to penetrate at all into the unknown with these inventions is our past experience that sometimes we have been fortunate enough to be able to push on a short distance by acquired momentum.
The Nature of Physical Theory (1936), 136.
Science quotes on:  |  General Relativity (5)  |  Logic (187)  |  Neutron (9)  |  Proton (12)  |  Quantum Theory (55)

Every theoretical physicist who is any good knows six or seven different theoretical representations for exactly the same physics. He knows that they are all equivalent, and that nobody is ever going to be able to decide which one is right at that level, but he keeps them in his head, hoping that they will give him different ideas for guessing.
In The Character of Physical Law (1965, 2001), 168.
Science quotes on:  |  Decide (25)  |  Different (110)  |  Equivalent (14)  |  Guess (36)  |  Idea (440)  |  Level (51)  |  Representation (27)  |  Right (144)  |  Theoretical Physics (15)

Everybody firmly believes in it [Nomal Law of Errors] because the mathematicians imagine it is a fact of observation, and observers that it is a theory of mathematics.
…...
Science quotes on:  |  Belief (400)  |  Error (230)  |  Everybody (16)  |  Fact (609)  |  Firmly (2)  |  Imagine (40)  |  Law (418)  |  Mathematician (177)  |  Mathematics (587)  |  Observation (418)  |  Observer (33)

Everything should be made as simple as possible, but not simpler.
Attributed.

Evolution ... is really two theories, the vague theory and the precise theory. The vague theory has been abundantly proved.... The precise theory has never been proved at all. However, like relativity, it is accepted on faith.... On getting down to actual details, difficulties begin.
In Science is a Sacred Cow (1950), 101 & 103.
Science quotes on:  |  Abundance (15)  |  Accept (37)  |  Detail (65)  |  Difficulty (113)  |  Evolution (482)  |  Precision (38)  |  Proof (192)  |  Relativity (50)  |  Vagueness (8)

Evolution is a theory of organic change, but it does not imply, as many people assume, that ceaseless flux is the irreducible state of nature and that structure is but a temporary incarnation of the moment. Change is more often a rapid transition between stable states than a continuous transformation at slow and steady rates. We live in a world of structure and legitimate distinction. Species are the units of nature’s morphology.
…...
Science quotes on:  |  Assume (19)  |  Ceaseless (4)  |  Change (291)  |  Continuous (24)  |  Distinction (37)  |  Evolution (482)  |  Flux (8)  |  Imply (12)  |  Incarnation (3)  |  Irreducible (5)  |  Legitimate (8)  |  Live (186)  |  Moment (61)  |  Morphology (18)  |  Nature (1029)  |  Often (69)  |  Organic (48)  |  People (269)  |  Rapid (17)  |  Rate (22)  |  Slow (36)  |  Species (181)  |  Stable (15)  |  State (96)  |  Steady (12)  |  Structure (191)  |  Temporary (13)  |  Transformation (47)  |  Transition (15)  |  Unit (25)  |  World (667)

Experience teaches nothing without theory.
In On the Management of Statistical Techniques for Quality and Productivity (1981), 86.
Science quotes on:  |  Experience (268)  |  Nothing (267)  |  Teach (102)

Facts alone, no matter how numerous or verifiable, do not automatically arrange themselves into an intelligible, or truthful, picture of the world. It is the task of the human mind to invent a theoretical framework to account for them.
In Francis Bello, Lawrence Lessing and George A.W. Boehm, Great American Scientists (1960, 1961), 116.
Science quotes on:  |  Account (45)  |  Arrange (15)  |  Automatic (13)  |  Fact (609)  |  Framework (15)  |  Human Mind (51)  |  Intelligible (10)  |  Invention (283)  |  Picture (55)  |  Scientific Method (155)  |  Task (68)  |  Truthful (2)  |  Verifiable (5)  |  World (667)

Facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts do not go away while scientists debate rival theories for explaining them. Einstein's theory of gravitation replaced Newton's, but apples did not suspend themselves in mid-air pending the outcome.
'Evolution as Fact and Theory', in Hen's Teeth and Horse's Toes (1983, 1994), Chap. 19.
Science quotes on:  |  Apple (33)  |  Certainty (97)  |  Data (100)  |  Debate (19)  |  Difference (208)  |  Albert Einstein (535)  |  Explanation (161)  |  Fact (609)  |  Hierarchy (11)  |  Idea (440)  |  Increasing (4)  |  Interpretation (61)  |  Sir Isaac Newton (258)  |  Outcome (10)  |  Rival (9)  |  Scientist (447)  |  Structure (191)  |  Suspend (7)  |  Theory Of Gravitation (6)  |  World (667)

Facts are a heap of bricks and timber. It is only a successful theory that can convert the heap into a stately mansion
Epigraph in Isaac Asimov’s Book of Science and Nature Quotations (1988), 324.
Science quotes on:  |  Brick (12)  |  Convert (15)  |  Fact (609)  |  Heap (12)  |  Mansion (3)  |  Stately (6)  |  Success (202)  |  Timber (7)

Facts are not pure unsullied bits of information; culture also influences what we see and how we see it. Theories, moreover, are not inexorable inductions from facts. The most creative theories are often imaginative visions imposed upon facts; the source of imagination is also strongly cultural.
In The Mismeasure of Man (1981, 1996), 54.
Science quotes on:  |  Creative (41)  |  Culture (85)  |  Fact (609)  |  Imagination (209)  |  Impose (17)  |  Induction (45)  |  Inexorable (5)  |  Influence (110)  |  Information (102)  |  Pure (62)  |  Source (71)  |  Vision (55)

Facts are of not much use, considered as facts. They bewilder by their number and their apparent incoherency. Let them be digested into theory, however, and brought into mutual harmony, and it is another matter.
From article 'Electro-magnetic Theory II', in The Electrician (16 Jan 1891), 26, No. 661, 331.
Science quotes on:  |  Bewilderment (4)  |  Consideration (65)  |  Digesting (2)  |  Fact (609)  |  Harmony (55)  |  Incoherency (2)

Factual assertions and fundamental principles are... merely parts of theories: they are given within the framework of a theory; they are chosen and valid within this framework; and subsequently they are dependent upon it. This holds for all empirical sciences—for the natural sciences as well as those pertaining to history.
Critique of Scientific Reason (1983), 106.
Science quotes on:  |  Empiricism (16)  |  Fact (609)  |  Framework (15)  |  History (302)  |  Natural Science (62)  |  Principle (228)

Finding the world would not accommodate to his theory, he wisely determined to accommodate the theory to the world.
Under the pseudonym of Diedrich Knickerbocker, in A History of New York (1809). Collected in The Works of Washington Irving (1840), Vol. 1, 24.
Science quotes on:  |  Accommodate (4)  |  Determine (45)  |  Wisely (2)  |  World (667)

First... a new theory is attacked as absurd; then it is admitted to be true, but obvious and insignificant; finally it is seen to be so important that its adversaries claim that they themselves discovered it.
'Pragmatism's Conception of Truth', in Pragmatism: A New Name for some Old Ways of Thinking, Popular Lectures on Philosophy (1907), 198.
Science quotes on:  |  Absurd (20)  |  Adversary (4)  |  Discovery (591)  |  True (120)

For if as scientists we seek simplicity, then obviously we try the simplest surviving theory first, and retreat from it only when it proves false. Not this course, but any other, requires explanation. If you want to go somewhere quickly, and several alternate routes are equally likely to be open, no one asks why you take the shortest. The simplest theory is to be chosen not because it is the most likely to be true but because it is scientifically the most rewarding among equally likely alternatives. We aim at simplicity and hope for truth.
Problems and Projects (1972), 352.
Science quotes on:  |  Scientific Method (155)  |  Simplicity (126)  |  Truth (750)

For if there is any truth in the dynamical theory of gases the different molecules in a gas at uniform temperature are moving with very different velocities. Put such a gas into a vessel with two compartments [A and B] and make a small hole in the wall about the right size to let one molecule through. Provide a lid or stopper for this hole and appoint a doorkeeper, very intelligent and exceedingly quick, with microscopic eyes but still an essentially finite being.
Whenever he sees a molecule of great velocity coming against the door from A into B he is to let it through, but if the molecule happens to be going slow he is to keep the door shut. He is also to let slow molecules pass from B to A but not fast ones ... In this way the temperature of B may be raised and that of A lowered without any expenditure of work, but only by the intelligent action of a mere guiding agent (like a pointsman on a railway with perfectly acting switches who should send the express along one line and the goods along another).
I do not see why even intelligence might not be dispensed with and the thing be made self-acting.
Moral The 2nd law of Thermodynamics has the same degree of truth as the statement that if you throw a tumblerful of water into the sea you cannot get the same tumblerful of water out again.
Letter to John William Strutt (6 Dec 1870). In P. M. Hannan (ed.), The Scientific Letters and Papers of James Clerk Maxwell (1995), Vol. 2, 582-3.
Science quotes on:  |  Gas (46)  |  Maxwell’s Demon (2)  |  Molecule (125)  |  Temperature (42)  |  Thermodynamics (27)

For strictly scientific or technological purposes all this is irrelevant. On a pragmatic view, as on a religious view, theory and concepts are held in faith. On the pragmatic view the only thing that matters is that the theory is efficacious, that it 'works' and that the necessary preliminaries and side issues do not cost too much in time and effort. Beyond that, theory and concepts go to constitute a language in which the scientistic matters at issue can be formulated and discussed.
'Slow Neutron Spectroscopy and the Grand Atlas of the Physical World', Nobel Lecture, 8 December 1994. In Nobel Lectures: Physics 1991-1995 (1997), 111.
Science quotes on:  |  Concept (102)

Fortunately I experienced Max Wertheimer's teaching in Berlin and collaborated for over a decade with Wolfgang Köhler. I need not emphasize my debts to these outstanding personalities. The fundamental ideas of Gestalt theory are the foundation of all our investigations in the field of the will, of affection, and of the personality.
From A Dynamic Theory of Personality. Selected papers (1935), 240.
Science quotes on:  |  Affection (14)  |  Debt (7)  |  Field (119)  |  Foundation (75)  |  Fundamental (122)  |  Gestalt (3)  |  Idea (440)  |  Investigation (123)  |  Wolfgang Köhler (6)  |  Outstanding (3)  |  Personality (40)  |  Max Wertheimer (9)

Freudian psychoanalytical theory is a mythology that answers pretty well to Levi-Strauss's descriptions. It brings some kind of order into incoherence; it, too, hangs together, makes sense, leaves no loose ends, and is never (but never) at a loss for explanation. In a state of bewilderment it may therefore bring comfort and relief … give its subject a new and deeper understanding of his own condition and of the nature of his relationship to his fellow men. A mythical structure will be built up around him which makes sense and is believable-in, regardless of whether or not it is true.
From 'Science and Literature', The Hope of Progress: A Scientist Looks at Problems in Philosophy, Literature and Science (1973), 29.
Science quotes on:  |  Bewilderment (4)  |  Comfort (42)  |  Condition (119)  |  Deeper (3)  |  Description (72)  |  Explanation (161)  |  Fellow (29)  |  Freudian (4)  |  Sigmund Freud (66)  |  Incoherence (2)  |  Loose End (3)  |  Myth (43)  |  Mythology (11)  |  Nature (1029)  |  New (340)  |  Order (167)  |  Psychoanalysis (37)  |  Relationship (59)  |  Relief (13)  |  Sense (240)  |  Structure (191)  |  Subject (129)  |  True (120)  |  Understanding (317)

From a certain temperature on, the molecules 'condense' without attractive forces; that is, they accumulate at zero velocity. The theory is pretty, but is there some truth in it.
Letter to Ehrenfest (Dec 1924). Quoted in Abraham Pais, Roger Penrose, Subtle Is the Lord: The Science and the Life of Albert Einstein (2005), 432.
Science quotes on:  |  Truth (750)

From astronomy we find the east, west, south, and north, as well as the theory of the heavens, the equinox, solstice, and courses of the stars. If one has no knowledge of these matters, he will not be able to have any comprehension of the theory of sundials.
Vitruvius
In De Architectura, Book 1, Chap 1, Sec. 10. As translated in Morris Hicky Morgan (trans.), Vitruvius: The Ten Books on Architecture (1914), 10.
Science quotes on:  |  Astronomy (175)  |  Comprehension (51)  |  East (10)  |  Equinox (4)  |  Heaven (118)  |  Knowledge (1128)  |  North (7)  |  Solstice (2)  |  South (8)  |  Star (251)  |  Sundial (5)  |  West (13)

From the medical theoretical standpoint, it suffices to deliberate and speculate regarding most illnesses. However, therapeutically, speculation is not adequate, and true and correct knowledge is imperative.
As quoted in Fred Rosner, The Medical Legacy of Moses Maimonides (1998), 54.
Science quotes on:  |  Deliberation (2)  |  Illness (22)  |  Imperative (8)  |  Knowledge (1128)  |  Speculation (77)  |  Truth (750)

From the point of view of the pure morphologist the recapitulation theory is an instrument of research enabling him to reconstruct probable lines of descent; from the standpoint of the student of development and heredity the fact of recapitulation is a difficult problem whose solution would perhaps give the key to a true understanding of the real nature of heredity.
Form and Function: A Contribution to the History of Animal Morphology (1916), 312-3.
Science quotes on:  |  Descent (14)  |  Development (228)  |  Difficulty (113)  |  Fact (609)  |  Heredity (51)  |  Instrument (73)  |  Key (38)  |  Line (44)  |  Morphology (18)  |  Nature (1029)  |  Probability (83)  |  Problem (362)  |  Reality (140)  |  Recapitulation (2)  |  Reconstruction (13)  |  Research (517)  |  Solution (168)  |  Standpoint (8)  |  Student (131)  |  Truth (750)  |  Understanding (317)  |  View (115)

Generally speaking, geologists seem to have been much more intent on making little worlds of their own, than in examining the crust of that which they inhabit. It would be much more desirable that facts should be placed in the foreground and theories in the distance, than that theories should be brought forward at the expense of facts. So that, in after times, when the speculations of the present day shall have passed away, from a greater accumulation of information, the facts may be readily seized and converted to account.
Sections and Views Illustrative of Geological Phenomena (1830), iv.
Science quotes on:  |  Fact (609)  |  Geology (187)

Genetics was, I would say, the first part of biology to become a pretty good theoretical subject, based on the theory of the gene and patterns of inheritance of characteristics.
From interview with Neil A. Campbell, in 'Crossing the Boundaries of Science', BioScience (Dec 1986), 36, No. 11, 738.
Science quotes on:  |  Biology (150)  |  Characteristic (66)  |  Gene (68)  |  Genetics (98)  |  Inheritance (19)  |  Pattern (56)  |  Subject (129)

Germs of a theory, though in their present condition they are vague and formless … may be said to resemble stones in the quarry, rough and unhewn, but which may some time become corner-stones, columns, and entablatures in the future edifice.
In Report on the Geology of the High Plateaus of Utah (1880), 114.
Science quotes on:  |  Column (10)  |  Cornerstone (3)  |  Edifice (13)  |  Formless (3)  |  Future (229)  |  Hypothesis (227)  |  Quarry (10)  |  Resemble (16)  |  Rough (5)  |  Stone (57)  |  Vague (10)

Given a large mass of data, we can by judicious selection construct perfectly plausible unassailable theories—all of which, some of which, or none of which may be right.
I-Ching and the citric acid cycle. Unpublished manuscript/seminar notes quoted in Frederick Grinnell, Everyday Practice of Science (2008), 86.
Science quotes on:  |  Data (100)  |  Statistics (125)  |  Truth (750)

Good lawyers know that in many cases where the decisions are correct, the reasons that are given to sustain them may be entirely wrong. This is a thousand times more likely to be true in the practice of medicine than in that of the law, and hence the impropriety, not to say the folly, in spending your time in the discussion of medical belief and theories of cure that are more ingenious and seductive than they are profitable.
Introductory lecture (22 Sep 1885), Hahnemann Medical College, Chicago, printed in United States Medical Investigator (1885), 21, 526.
Science quotes on:  |  Belief (400)  |  Correct (53)  |  Cure (88)  |  Decision (58)  |  Discussion (37)  |  Folly (27)  |  Impropriety (3)  |  Ingenious (18)  |  Lawyer (18)  |  Medicine (322)  |  Profitable (6)  |  Reason (330)  |  Seductive (4)  |  Thousand (106)  |  Wrong (116)

Great scientific discoveries have been made by men seeking to verify quite erroneous theories about the nature of things.
From 'Wordsworth in the Tropics', in Life and Letters and the London Mercury (1928), Vol. 1, 349.
Science quotes on:  |  Discovery (591)  |  Error (230)  |  Great (300)  |  Nature (1029)  |  Scientific (169)  |  Seek (57)  |  Verification (20)

Great theories are expansive; failures mire us in dogmatism and tunnel vision.
…...
Science quotes on:  |  Dogmatism (9)  |  Expansive (2)  |  Failure (118)  |  Great (300)  |  Mire (2)  |  Tunnel (7)  |  Vision (55)

He [Samuel Johnson] bid me always remember this, that after a system is well settled upon positive evidence, a few objections ought not to shake it. “The human mind is so limited that it cannot take in all parts of a subject; so that there may be objections raised against anything. There are objections against a plenum, and objections against a vacuum. Yet one of them must certainly be true.”
Note: Whereas vacuum means devoid of matter, plenum regards a space with matter throughout.
Science quotes on:  |  Evidence (157)  |  Samuel Johnson (44)  |  Objection (16)

Here I shall present, without using Analysis [mathematics], the principles and general results of the Théorie, applying them to the most important questions of life, which are indeed, for the most part, only problems in probability. One may even say, strictly speaking, that almost all our knowledge is only probable; and in the small number of things that we are able to know with certainty, in the mathematical sciences themselves, the principal means of arriving at the truth—induction and analogy—are based on probabilities, so that the whole system of human knowledge is tied up with the theory set out in this essay.
Philosophical Essay on Probabilities (1814), 5th edition (1825), trans. Andrew I. Dale (1995), 1.
Science quotes on:  |  Analogy (46)  |  Analysis (123)  |  Certainty (97)  |  Importance (183)  |  Induction (45)  |  Knowledge (1128)  |  Life (917)  |  Mathematics (587)  |  Principle (228)  |  Probability (83)  |  Problem (362)  |  Question (315)  |  Result (250)  |  Truth (750)

His [Thomas Edison] method was inefficient in the extreme, for an immense ground had to be covered to get anything at all unless blind chance intervened and, at first, I was almost a sorry witness of his doings, knowing that just a little theory and calculation would have saved him 90 per cent of the labor. But he had a veritable contempt for book learning and mathematical knowledge, trusting himself entirely to his inventor's instinct and practical American sense. In view of this, the truly prodigious amount of his actual accomplishments is little short of a miracle.
As quoted in 'Tesla Says Edison Was an Empiricist', The New York Times (19 Oct 1931), 25. In 1884, Tesla had moved to America to assist Edison in the designing of motors and generators.
Science quotes on:  |  Accomplishment (57)  |  American (34)  |  Book (181)  |  Calculation (67)  |  Contempt (11)  |  Thomas Edison (74)  |  Extreme (36)  |  Inefficient (2)  |  Instinct (50)  |  Inventor (49)  |  Knowledge (1128)  |  Labor (53)  |  Learning (174)  |  Mathematics (587)  |  Method (154)  |  Miracle (55)  |  Practical (93)  |  Prodigious (6)  |  Saving (19)  |  Trust (40)  |  Witness (18)

Historical theories are, after all, intellectual apple carts. They are quite likely to be upset. Nor should it be forgotten that they tend to attract, when they gain ascendancy, a fair number of apple-polishers
'Books of the Times'. New York Times (9 Dec 1965), 45.
Science quotes on:  |  Apple (33)  |  Attract (15)  |  Cart (2)  |  Forget (40)  |  Gain (48)  |  History (302)  |  Intellect (157)  |  Polish (8)  |  Tendency (40)  |  Upset (6)

How strange it would be if the final theory were to be discovered in our lifetimes! The discovery of the final laws of nature will mark a discontinuity in human intellectual history, the sharpest that has occurred since the beginning of modern science in the seventeenth century. Can we now imagine what that would be like?
In Dreams of a Final Theory (1992), 235.
Science quotes on:  |  17th Century (10)  |  Beginning (114)  |  Discontinuity (3)  |  Discovery (591)  |  Final (33)  |  History (302)  |  Human (445)  |  Imagine (40)  |  Intellect (157)  |  Law Of Nature (52)  |  Lifetime (19)  |  Like (18)  |  Modern Science (10)  |  Occurrence (30)  |  Sharp (12)  |  Strange (61)

How then did we come to the “standard model”? And how has it supplanted other theories, like the steady state model? It is a tribute to the essential objectivity of modern astrophysics that this consensus has been brought about, not by shifts in philosophical preference or by the influence of astrophysical mandarins, but by the pressure of empirical data.
In The First Three Minutes: A Modern View of the Origin of the Universe (1977), 9.
Science quotes on:  |  Astrophysics (12)  |  Consensus (5)  |  Data (100)  |  Empiricism (16)  |  Essential (87)  |  Influence (110)  |  Modern (104)  |  Objectivity (9)  |  Philosophy (213)  |  Preference (18)  |  Pressure (31)  |  Shift (21)  |  Standard Model (2)  |  Steady State (3)  |  Supplanting (2)  |  Tribute (4)

How thoroughly it is ingrained in mathematical science that every real advance goes hand in hand with the invention of sharper tools and simpler methods which, at the same time, assist in understanding earlier theories and in casting aside some more complicated developments.
In 'Mathematical Problems', Lecture at the International Congress of Mathematics, Paris, (8 Aug 1900). Translated by Dr. Maby Winton Newson in Bulletin of the American Mathematical Society (1902), 8, 479. As quoted and cited in Robert Édouard Moritz, Memorabilia Mathematica; Or, The Philomath's Quotation-book (1914), 94-95. It is reprinted in Jeremy Gray, The Hilbert Challenge (2000), 282.
Science quotes on:  |  Advance (123)  |  Complicated (38)  |  Development (228)  |  Ingrained (4)  |  Invention (283)  |  Mathematics (587)  |  Method (154)  |  Sharp (12)  |  Simpler (5)  |  Thoroughly (7)  |  Tool (70)  |  Understanding (317)

Human language is in some ways similar to, but in other ways vastly different from, other kinds of animal communication. We simply have no idea about its evolutionary history, though many people have speculated about its possible origins. There is, for instance, the “bow-bow” theory, that language started from attempts to imitate animal sounds. Or the “ding-dong” theory, that it arose from natural sound-producing responses. Or the “pooh-pooh” theory, that it began with violent outcries and exclamations.
We have no way of knowing whether the kinds of men represented by the earliest fossils could talk or not…
Language does not leave fossils, at least not until it has become written.
Man in Nature (1961), 10.
Science quotes on:  |  Animal (309)  |  Communication (58)  |  Different (110)  |  Evolution (482)  |  Exclamation (2)  |  Fossil (107)  |  History (302)  |  Human (445)  |  Idea (440)  |  Imitate (5)  |  Know (321)  |  Language (155)  |  Origin (77)  |  Outcry (3)  |  Response (24)  |  Similar (22)  |  Sound (59)  |  Speculation (77)  |  Talk (61)  |  Violent (15)  |  Write (87)

Hygiene is the corruption of medicine by morality. It is impossible to find a hygienist who does not debase his theory of the healthful with a theory of the virtuous. ... The aim of medicine is surely not to make men virtuous; it is to safeguard them from the consequences of their vices.
In 'The Physician', Prejudices: third series (1922), 269.
Science quotes on:  |  Aim (58)  |  Consequence (76)  |  Corruption (9)  |  Health (136)  |  Hygiene (8)  |  Impossibility (50)  |  Medicine (322)  |  Morality (33)  |  Safeguard (4)  |  Vice (15)  |  Virtue (55)

I always love geology. In winter, particularly, it is pleasant to listen to theories about the great mountains one visited in the summer; or about the Flood or volcanoes; about great catastrophes or about blisters; above all about fossils … Everywhere there are hypotheses, but nowhere truths; many workmen, but no experts; priests, but no God. In these circumstances each man can bring his hypothesis like a candle to a burning altar, and on seeing his candle lit declare ‘Smoke for smoke, sir, mine is better than yours’. It is precisely for this reason that I love geology.
In Nouvelles Genevoises (1910), 306. First edition, 1841.
Science quotes on:  |  Altar (6)  |  Better (131)  |  Blister (2)  |  Bring (53)  |  Burning (17)  |  Candle (19)  |  Catastrophe (17)  |  Circumstance (48)  |  Expert (42)  |  Flood (26)  |  Fossil (107)  |  Geology (187)  |  God (454)  |  Hypothesis (227)  |  Light (246)  |  Listen (26)  |  Love (164)  |  Mountain (111)  |  Particularly (12)  |  Pleasant (16)  |  Precisely (11)  |  Priest (16)  |  Reason (330)  |  Smoke (16)  |  Summer (26)  |  Truth (750)  |  Visit (15)  |  Volcano (36)  |  Winter (22)  |  Workman (9)

I am a firm believer in the theory that you can do or be anything that you wish in this world, within reason, if you are prepared to make the sacrifices, think and work hard enough and long enough.
From Cameron Prize Lecture (1928), delivered before the University of Edinburgh. As quoted and cited in Editorial Section, 'Sir Frederick Banting', Canadian Public Health Journal (May 1941), 32, No. 5, 266-267.
Science quotes on:  |  Believer (8)  |  Enough (6)  |  Firm (19)  |  Hard (70)  |  Long (95)  |  Prepare (19)  |  Reason (330)  |  Sacrifice (24)  |  Think (205)  |  Wish (62)  |  Work (457)  |  World (667)

I am afraid all we can do is to accept the paradox and try to accommodate ourselves to it, as we have done to so many paradoxes lately in modern physical theories. We shall have to get accustomed to the idea that the change of the quantity R, commonly called the 'radius of the universe', and the evolutionary changes of stars and stellar systems are two different processes, going on side by side without any apparent connection between them. After all the 'universe' is an hypothesis, like the atom, and must be allowed the freedom to have properties and to do things which would be contradictory and impossible for a finite material structure.
Kosmos (1932), 133.
Science quotes on:  |  Acceptance (41)  |  Accommodation (5)  |  Accustom (7)  |  Afraid (15)  |  Apparent (26)  |  Atom (251)  |  Change (291)  |  Connection (86)  |  Contradiction (44)  |  Difference (208)  |  Evolution (482)  |  Finite (22)  |  Freedom (76)  |  Hypothesis (227)  |  Idea (440)  |  Impossibility (50)  |  Material (124)  |  Modern (104)  |  Paradox (35)  |  Physical (94)  |  Process (201)  |  Property (96)  |  Quantity (35)  |  Radius (4)  |  Star (251)  |  Stellar (3)  |  Structure (191)  |  System (141)  |  Universe (563)

I am more fond of achieving than striving. My theories must prove to be facts or be discarded as worthless. My efforts must soon be crowned with success, or discontinued.
The Rest of My Life, ch. 4 (1937).Wells wrote, in addition to other works, the popular 'Fleming Stone' detective series.
Science quotes on:  |  Achieve (36)  |  Crown (19)  |  Discard (14)  |  Discontinue (2)  |  Effort (94)  |  Fact (609)  |  Fond (9)  |  Prove (60)  |  Soon (17)  |  Strive (35)  |  Success (202)  |  Worthless (15)

I am now convinced that we have recently become possessed of experimental evidence of the discrete or grained nature of matter, which the atomic hypothesis sought in vain for hundreds and thousands of years. The isolation and counting of gaseous ions, on the one hand, which have crowned with success the long and brilliant researches of J.J. Thomson, and, on the other, agreement of the Brownian movement with the requirements of the kinetic hypothesis, established by many investigators and most conclusively by J. Perrin, justify the most cautious scientist in now speaking of the experimental proof of the atomic nature of matter, The atomic hypothesis is thus raised to the position of a scientifically well-founded theory, and can claim a place in a text-book intended for use as an introduction to the present state of our knowledge of General Chemistry.
In Grundriss der allgemeinen Chemie (4th ed., 1909), Preface, as cited by Erwin N. Hiebert and Hans-Gunther Korber in article on Ostwald in Charles Coulston Gillespie (ed.), Dictionary of Scientific Biography Supplement 1, Vol 15-16, 464.
Science quotes on:  |  Atom (251)  |  Brilliant (14)  |  Robert Brown (2)  |  Caution (15)  |  Chemistry (239)  |  Claim (52)  |  Conviction (57)  |  Counting (5)  |  Crown (19)  |  Discrete (6)  |  Evidence (157)  |  Experiment (543)  |  Gas (46)  |  Granular (2)  |  Hypothesis (227)  |  Introduction (31)  |  Ion (8)  |  Isolation (26)  |  Long (95)  |  Matter (270)  |  Jean Perrin (2)  |  Possession (37)  |  Proof (192)  |  Recent (23)  |  Research (517)  |  Scientist (447)  |  Seeking (30)  |  Speaking (38)  |  Success (202)  |  Text-Book (2)  |  Sir J.J. Thomson (17)  |  Vain (26)  |  Year (214)

I am particularly concerned to determine the probability of causes and results, as exhibited in events that occur in large numbers, and to investigate the laws according to which that probability approaches a limit in proportion to the repetition of events. That investigation deserves the attention of mathematicians because of the analysis required. It is primarily there that the approximation of formulas that are functions of large numbers has its most important applications. The investigation will benefit observers in identifying the mean to be chosen among the results of their observations and the probability of the errors still to be apprehended. Lastly, the investigation is one that deserves the attention of philosophers in showing how in the final analysis there is a regularity underlying the very things that seem to us to pertain entirely to chance, and in unveiling the hidden but constant causes on which that regularity depends. It is on the regularity of the main outcomes of events taken in large numbers that various institutions depend, such as annuities, tontines, and insurance policies. Questions about those subjects, as well as about inoculation with vaccine and decisions of electoral assemblies, present no further difficulty in the light of my theory. I limit myself here to resolving the most general of them, but the importance of these concerns in civil life, the moral considerations that complicate them, and the voluminous data that they presuppose require a separate work.
Philosophical Essay on Probabilities (1825), trans. Andrew I. Dale (1995), Introduction.
Science quotes on:  |  Analysis (123)  |  Application (117)  |  Approximation (16)  |  Cause (231)  |  Chance (122)  |  Complication (20)  |  Concern (76)  |  Data (100)  |  Determine (45)  |  Difficulty (113)  |  Error (230)  |  Event (97)  |  Formula (51)  |  Function (90)  |  Government (85)  |  Inoculation (8)  |  Institution (32)  |  Insurance (9)  |  Investigation (123)  |  Law (418)  |  Limit (86)  |  Mathematician (177)  |  Mean (63)  |  Morality (33)  |  Outcome (10)  |  Philosopher (132)  |  Probability (83)  |  Proportion (47)  |  Regularity (24)  |  Result (250)  |  Vaccine (8)

I argued that it was important not to place too much reliance on any single piece of experimental evidence. It might turn out to be misleading, as the 5.1 Å reflection undoubtedly was. Jim was a little more brash, stating that no good model ever accounted for all the facts, since some data was bound to be misleading if not plain wrong. A theory that did fit all the data would have been “carpentered” to do so and would thus be open to suspicion.
In What Mad Pursuit: A Personal View of Scientific Discovery (1988), 59-60.
Science quotes on:  |  Account (45)  |  Data (100)  |  Evidence (157)  |  Experiment (543)  |  Fact (609)  |  Fit (31)  |  Good (228)  |  Important (124)  |  Misleading (12)  |  Model (64)  |  Reflection (50)  |  Reliance (9)  |  Suspicion (25)  |  James Watson (33)  |  Wrong (116)

I believe that certain erroneous developments in particle theory ... are caused by a misconception by some physicists that it is possible to avoid philosophical arguments altogether. Starting with poor philosophy, they pose the wrong questions. It is only a slight exaggeration to say that good physics has at times been spoiled by poor philosophy.
…...
Science quotes on:  |  Altogether (6)  |  Argument (59)  |  Avoid (34)  |  Belief (400)  |  Cause (231)  |  Certain (84)  |  Development (228)  |  Erroneous (3)  |  Exaggeration (7)  |  Good (228)  |  Misconception (5)  |  Particle (90)  |  Philosophical (14)  |  Philosophy (213)  |  Physicist (130)  |  Physics (301)  |  Poor (46)  |  Pose (5)  |  Possible (100)  |  Question (315)  |  Say (126)  |  Slight (18)  |  Spoil (5)  |  Start (68)  |  Time (439)  |  Wrong (116)

I bet it would have been a lot of fun to work with Einstein. What I really respect about Einstein is his desire to throw aside all conventional modes and just concentrate on what seems to be the closest we can get to an accurate theory of nature.
Alan Guth
As quoted by Christina Couch, '10 Questions for Alan Guth, Pioneer of the Inflationary Model of the Universe' (7 Jan 2016) on the website for NPR radio program Science Friday.
Science quotes on:  |  Accurate (21)  |  Concentrate (11)  |  Conventional (16)  |  Desire (101)  |  Albert Einstein (535)  |  Fun (28)  |  Mode (29)  |  Nature (1029)  |  Respect (57)  |  Throw (31)  |  Work (457)

I can assure you, reader, that in a very few hours, even during the first day, you will learn more natural philosophy about things contained in this book, than you could learn in fifty years by reading the theories and opinions of the ancient philosophers. Enemies of science will scoff at the astrologers: saying, where is the ladder on which they have climbed to heaven, to know the foundation of the stars? But in this respect I am exempt from such scoffing; for in proving my written reason, I satisfy sight, hearing, and touch: for this reason, defamers will have no power over me: as you will see when you come to see me in my little Academy.
The Admirable Discourses (1580), trans. Aurele La Rocque (1957), 27.
Science quotes on:  |  Academy (11)  |  Ancient (68)  |  Assurance (8)  |  Astrologer (6)  |  Book (181)  |  Climb (14)  |  Contain (37)  |  Day (38)  |  Enemy (52)  |  Exemption (2)  |  Fifty (15)  |  First (174)  |  Foundation (75)  |  Hearing (27)  |  Heaven (118)  |  Hour (42)  |  Knowledge (1128)  |  Ladder (7)  |  Learning (174)  |  Natural Philosophy (21)  |  Opinion (146)  |  Philosopher (132)  |  Power (273)  |  Proof (192)  |  Reader (22)  |  Reading (51)  |  Reason (330)  |  Respect (57)  |  Satisfaction (48)  |  Science (1699)  |  Sight (25)  |  Star (251)  |  Touch (48)  |  Writing (72)  |  Year (214)

I can well appreciate, Holy Father, that as soon as certain people realise that in these books which I have written about the Revolutions of the spheres of the universe I attribute certain motions to the globe of the Earth, they will at once clamour for me to be hooted off the stage with such an opinion.
'To His Holiness Pope Paul III', in Copernicus: On the Revolutions of the Heavenly Spheres (1543), trans. A.M. Duncan (1976), 23.
Science quotes on:  |  Solar System (48)

I conceived and developed a new geometry of nature and implemented its use in a number of diverse fields. It describes many of the irregular and fragmented patterns around us, and leads to full-fledged theories, by identifying a family of shapes I call fractals.
The Fractal Geometry of Nature (1977, 1983), Introduction, xiii.
Science quotes on:  |  Fractal (9)  |  Nomenclature (129)  |  Pattern (56)  |  Shape (52)

I first met J. Robert Oppenheimer on October 8, 1942, at Berkeley, Calif. There we discussed the theoretical research studies he was engaged in with respect to the physics of the bomb. Our discussions confirmed my previous belief that we should bring all of the widely scattered theoretical work together. … He expressed complete agreement, and it was then that the idea of the prompt establishment of a Los Alamos was conceived.”
In 'Some Recollections of July 16, 1945', Bulletin of the Atomic Scientists (Jun 1970), 26, No. 6, 21.
Science quotes on:  |  Atomic Bomb (101)  |  Discussion (37)  |  Establishment (29)  |  Los Alamos (3)  |  Manhattan Project (11)  |  J. Robert Oppenheimer (30)  |  Research (517)

I grow daily to honor facts more and more, and theory less and less.
Science quotes on:  |  Fact (609)  |  Honor (21)

I had made considerable advance ... in calculations on my favourite numerical lunar theory, when I discovered that, under the heavy pressure of unusual matters (two transits of Venus and some eclipses) I had committed a grievous error in the first stage of giving numerical value to my theory. My spirit in the work was broken, and I have never heartily proceeded with it since.
[Concerning his calculations on the orbital motion of the Moon.]
Private note (29 Sep 1890). In George Biddell Airy and Wilfrid Airy (ed.), Autobiography of Sir George Biddell Airy (1896), 350.
Science quotes on:  |  Advance (123)  |  Broken (10)  |  Calculation (67)  |  Considerable (11)  |  Error (230)  |  Favourite (5)  |  Heartily (3)  |  Lunar (5)  |  Moon (132)  |  Number (179)  |  Orbit (58)  |  Proceeding (13)  |  Spirit (113)

I have a peculiar theory about radium, and I believe it is the correct one. I believe that there is some mysterious ray pervading the universe that is fluorescing to it. In other words, that all its energy is not self-constructed but that there is a mysterious something in the atmosphere that scientists have not found that is drawing out those infinitesimal atoms and distributing them forcefully and indestructibly.
Quoted in 'Edison Fears Hidden Perils of the X-Rays', New York World (3 Aug 1903), 1.
Science quotes on:  |  Atmosphere (63)  |  Atom (251)  |  Distribution (21)  |  Energy (185)  |  Fluorescence (2)  |  Mystery (125)  |  Radium (19)  |  Ray (32)  |  Universe (563)

I have been scientifically studying the traits and dispositions of the “lower animals” (so-called,) and contrasting them with the traits and dispositions of man. I find the result profoundly humiliating to me. For it obliges me to renounce my allegiance to the Darwinian theory of the Ascent of Man from the Lower Animals; since it now seems plain to me that that theory ought to be vacated in favor of a new and truer one, this new and truer one to be named the Descent of Man from the Higher Animals.
'Man's Place in the Animal World' (1896) in What is Man?: and Other Philosophical Writings (1973), 81.
Science quotes on:  |  Animal (309)  |  Ascent Of Man (6)  |  Charles Darwin (284)  |  Descent Of Man (5)  |  Lower (11)  |  New (340)  |  Obligation (13)  |  Truth (750)

I have just got a new theory of eternity.
Alleged comment to the secretary of the Netherlands embassy, seated beside him at a National Academy of Sciences annual awards ceremony (1921), after listening to lengthy formal speeches. As quoted in Ronald W. Clark, Einstein: The Life and Times (1971), 389.
Science quotes on:  |  Eternity (44)  |  New (340)

I have learnt that all our theories are not Truth itself, but resting places or stages on the way to the conquest of Truth, and that we must be contented to have obtained for the strivers after Truth such a resting place which, if it is on a mountain, permits us to view the provinces already won and those still to be conquered.
Liebig to Gilbert (25 Dec 1870). Rothamsted Archives. Quotation supplied by W. H. Brock.
Science quotes on:  |  Truth (750)

I have long recognized the theory and aesthetic of such comprehensive display: show everything and incite wonder by sheer variety. But I had never realized how power fully the decor of a cabinet museum can promote this goal until I saw the Dublin [Natural History Museum] fixtures redone right ... The exuberance is all of one piece–organic and architectural. I write this essay to offer my warmest congratulations to the Dublin Museum for choosing preservation–a decision not only scientifically right, but also ethically sound and decidedly courageous. The avant-garde is not an exclusive locus of courage; a principled stand within a reconstituted rear unit may call down just as much ridicule and demand equal fortitude. Crowds do not always rush off in admirable or defendable directions.
…...
Science quotes on:  |  Admirable (11)  |  Aesthetic (26)  |  Cabinet (4)  |  Call (68)  |  Choose (35)  |  Comprehensive (7)  |  Congratulations (3)  |  Courage (39)  |  Crowd (12)  |  Decision (58)  |  Demand (52)  |  Direction (56)  |  Display (22)  |  Down (44)  |  Dublin (2)  |  Equal (53)  |  Essay (9)  |  Ethically (4)  |  Everything (120)  |  Exclusive (9)  |  Fixture (2)  |  Fully (11)  |  Goal (81)  |  Incite (2)  |  Locus (3)  |  Long (95)  |  Museum (22)  |  Natural History (44)  |  Offer (16)  |  Organic (48)  |  Piece (32)  |  Power (273)  |  Preservation (28)  |  Principle (228)  |  Promote (14)  |  Realize (43)  |  Rear (6)  |  Recognize (41)  |  Reconstitute (2)  |  Ridicule (13)  |  Right (144)  |  Rush (12)  |  Scientifically (3)  |  See (197)  |  Sheer (6)  |  Show (55)  |  Sound (59)  |  Stand (60)  |  Unit (25)  |  Variety (53)  |  Warm (20)  |  Wonder (134)  |  Write (87)

I have no doubt that certain learned men, now that the novelty of the hypotheses in this work has been widely reported—for it establishes that the Earth moves, and indeed that the Sun is motionless in the middle of the universe—are extremely shocked, and think that the scholarly disciplines, rightly established once and for all, should not be upset. But if they are willing to judge the matter thoroughly, they will find that the author of this work has committed nothing which deserves censure. For it is proper for an astronomer to establish a record of the motions of the heavens with diligent and skilful observations, and then to think out and construct laws for them, or rather hypotheses, whatever their nature may be, since the true laws cannot be reached by the use of reason; and from those assumptions the motions can be correctly calculated, both for the future and for the past. Our author has shown himself outstandingly skilful in both these respects. Nor is it necessary that these hypotheses should be true, nor indeed even probable, but it is sufficient if they merely produce calculations which agree with the observations... For it is clear enough that this subject is completely and simply ignorant of the laws which produce apparently irregular motions. And if it does work out any laws—as certainly it does work out very many—it does not do so in any way with the aim of persuading anyone that they are valid, but only to provide a correct basis for calculation. Since different hypotheses are sometimes available to explain one and the same motion (for instance eccentricity or an epicycle for the motion of the Sun) an astronomer will prefer to seize on the one which is easiest to grasp; a philosopher will perhaps look more for probability; but neither will grasp or convey anything certain, unless it has been divinely revealed to him. Let us therefore allow these new hypotheses also to become known beside the older, which are no more probable, especially since they are remarkable and easy; and let them bring with them the vast treasury of highly learned observations. And let no one expect from astronomy, as far as hypotheses are concerned, anything certain, since it cannot produce any such thing, in case if he seizes on things constructed for another other purpose as true, he departs from this discipline more foolish than he came to it.
Assumed by contemporary readers to be written by Copernicus himself, this preface suggested the earth's motion was merely a mathematical device and not to be taken seriously.
'To the Reader on the Hypotheses In this Work', Unsigned preface by Andreas Osiander to Copernicus: On the Revolutions of the Heavenly Spheres (1543), trans. A. M. Duncan (1976), 22-3.
Science quotes on:  |  Earth (487)  |  Solar System (48)

I have no trouble publishing in Soviet astrophysical journals, but my work is unacceptable to the American astrophysical journals.
[Referring to the trouble he had with the peer reviewers of Anglo-American astrophysical journals because his ideas often conflicted with the generally accepted or “standard"” theories.]
Quoted in Anthony L. Peratt, 'Dean of the Plasma Dissidents', Washington Times, supplement: The World and I (May 1988),197.
Science quotes on:  |  American (34)  |  Astrophysics (12)  |  Conflict (49)  |  Idea (440)  |  Journal (13)  |  Publication (83)  |  Soviet (2)  |  Standard (41)  |  Trouble (55)

I know very well the people you mean: they are all mind and theory and haven't the wit to sew on a button. Plenty of head but not hand enough to sew on a button.
Aphorism 75 in Notebook D (1773-1775), as translated by R.J. Hollingdale in Aphorisms (1990). Reprinted as The Waste Books (2000), 55.
Science quotes on:  |  Button (3)  |  Hand (103)  |  Head (52)  |  Mind (544)  |  Sewing (3)  |  Wit (27)

I learnt to distrust all physical concepts as the basis for a theory. Instead one should put one's trust in a mathematical scheme, even if the scheme does not appear at first sight to be connected with physics. One should concentrate on getting interesting mathematics.
From a 1977 lecture. Quoted in Pesi Rustom Masani, Norbert Wiener, 1894-1964 (1990), 6.
Science quotes on:  |  Concept (102)  |  Mathematics (587)  |  Physics (301)  |  Trust (40)

I noticed affixed to a laboratory door the following words: “Les théories passent. Le Grenouille reste. [The theories pass. The frog remains.] &mdashJean Rostand, Carnets d’un biologiste.” There is a risk that in the less severe discipline of criticism the result may turn out to be different; the theories will remain but the frog may disappear.
In An Appetite for Poetry (1989), 5.
Science quotes on:  |  Criticism (52)  |  Difference (208)  |  Disappearance (21)  |  Discipline (38)  |  Frog (30)  |  Laboratory (120)  |  Notice (20)  |  Passing (5)  |  Remaining (13)  |  Result (250)  |  Jean Rostand (21)  |  Words (2)

I once knew an otherwise excellent teacher who compelled his students to perform all their demonstrations with incorrect figures, on the theory that it was the logical connection of the concepts, not the figure, that was essential.
In Ernst Mach and Thomas Joseph McCormack, Space and Geometry (1906), 93.
Science quotes on:  |  Compel (14)  |  Concept (102)  |  Connection (86)  |  Demonstration (51)  |  Essential (87)  |  Excellent (15)  |  Incorrect (6)  |  Logic (187)  |  Perform (27)  |  Student (131)  |  Teacher (90)

I pass with relief from the tossing sea of Cause and Theory to the firm ground of Result and Fact.
Science quotes on:  |  Cause (231)  |  Fact (609)  |  Firm (19)  |  Ground (63)  |  Relief (13)  |  Result (250)  |  Sea (143)  |  Toss (3)

I respect Kirkpatrick both for his sponges and for his numinous nummulosphere. It is easy to dismiss a crazy theory with laughter that debars any attempt to understand a man’s motivation–and the nummulosphere is a crazy theory. I find that few men of imagination are not worth my attention. Their ideas may be wrong, even foolish, but their methods often repay a close study ... The different drummer often beats a fruitful tempo.
…...
Science quotes on:  |  Attempt (94)  |  Attention (76)  |  Beat (15)  |  Both (52)  |  Close (40)  |  Crazy (11)  |  Different (110)  |  Dismiss (6)  |  Drummer (2)  |  Easy (56)  |  Find (248)  |  Foolish (16)  |  Fruitful (31)  |  Idea (440)  |  Imagination (209)  |  Laughter (22)  |  Method (154)  |  Motivation (21)  |  Often (69)  |  Repay (2)  |  Respect (57)  |  Sponge (9)  |  Study (331)  |  Tempo (2)  |  Understand (189)  |  Worth (74)  |  Wrong (116)

I shall explain a System of the World differing in many particulars from any yet known, answering in all things to the common Rules of Mechanical Motions: This depends upon three Suppositions. First, That all Cœlestial Bodies whatsoever, have an attraction or gravitating power towards their own Centers, whereby they attract not only their own parts, and keep them from flying from them, as we may observe the Earth to do, but that they do also attract all the other Cœlestial bodies that are within the sphere of their activity; and consequently that not only the Sun and Moon have an influence upon the body and motion the Earth, and the Earth upon them, but that Mercury also Venus, Mars, Saturn and Jupiter by their attractive powers, have a considerable influence upon its motion in the same manner the corresponding attractive power of the Earth hath a considerable influence upon every one of their motions also. The second supposition is this, That all bodies whatsoever that are put into a direct and simple motion, will continue to move forward in a streight line, till they are by some other effectual powers deflected and bent into a Motion, describing a Circle, Ellipse, or some other more compounded Curve Line. The third supposition is, That these attractive powers are so much the more powerful in operating, by how much the nearer the body wrought upon is to their own Centers. Now what these several degrees are I have not yet experimentally verified; but it is a notion, which if fully prosecuted as it ought to be, will mightily assist the Astronomer to reduce all the Cœlestial Motions to a certain rule, which I doubt will never be done true without it. He that understands the nature of the Circular Pendulum and Circular Motion, will easily understand the whole ground of this Principle, and will know where to find direction in Nature for the true stating thereof. This I only hint at present to such as have ability and opportunity of prosecuting this Inquiry, and are not wanting of Industry for observing and calculating, wishing heartily such may be found, having myself many other things in hand which I would first compleat and therefore cannot so well attend it. But this I durst promise the Undertaker, that he will find all the Great Motions of the World to be influenced by this Principle, and that the true understanding thereof will be the true perfection of Astronomy.
An Attempt to Prove the Motion of the Earth from Observations (1674), 27-8. Based on a Cutlerian Lecture delivered by Hooke at the Royal Society four years earlier.
Science quotes on:  |  Gravitation (27)  |  Inertia (10)  |  Moon (132)  |  Orbit (58)  |  Pendulum (13)  |  Planet (199)  |  Sun (211)

I should like to call the number of atom groups, with which an elementary atom coordinates … to form a complex radical, the coordination number of the atom in question … We must differentiate between valence number and coordination number. The valence number indicates the maximum number of monovalent atoms which can be bound directly to the atom in question without the participation of other elementary atoms … Perhaps this concept [of coordination number] is destined to serve as a basis for the theory of the constitution of inorganic compounds, just as valence theory formed the basis for the constitutional theory of carbon compounds.
In 'Beitrag zur Konstitution anorganischer Verbindungen', Zeitschrift fur anorganische Chemie, (1893), 3, 267-330. Translated in George G. Kauffman (ed.), Classics in Coordination Chemistry: Part I: The Selected Papers of Alfred Werner (1968), 84-87.
Science quotes on:  |  Atom (251)  |  Basis (60)  |  Carbon (48)  |  Complex (78)  |  Compound (53)  |  Group (52)  |  Inorganic (11)  |  Participation (7)  |  Question (315)  |  Radical (17)

I therefore took this opportunity and also began to consider the possibility that the Earth moved. Although it seemed an absurd opinion, nevertheless, because I knew that others before me had been granted the liberty of imagining whatever circles they wished to represent the phenomena of the stars, I thought that I likewise would readily be allowed to test whether, by assuming some motion of the Earth's, more dependable representations than theirs could be found for the revolutions of the heavenly spheres.
'To His Holiness Pope Paul III', in Copernicus: On the Revolutions of the Heavenly Spheres (1543), trans. A. M. Duncan (1976), 26.
Science quotes on:  |  Solar System (48)

I think a strong claim can be made that the process of scientific discovery may be regarded as a form of art. This is best seen in the theoretical aspects of Physical Science. The mathematical theorist builds up on certain assumptions and according to well understood logical rules, step by step, a stately edifice, while his imaginative power brings out clearly the hidden relations between its parts. A well constructed theory is in some respects undoubtedly an artistic production. A fine example is the famous Kinetic Theory of Maxwell. ... The theory of relativity by Einstein, quite apart from any question of its validity, cannot but be regarded as a magnificent work of art.
Responding to the toast, 'Science!' at the Royal Academy of the Arts in 1932.)
Quoted in Lawrence Badash, 'Ernest Rutherford and Theoretical Physics,' in Robert Kargon and Peter Achinstein (eds.) Kelvin's Baltimore Lectures and Modern Theoretical Physics: Historical and Philosophical Perspectives (1987), 352.
Science quotes on:  |  Art (205)  |  Discovery (591)  |  Albert Einstein (535)  |  Imagination (209)  |  Kinetic Theory (7)  |  James Clerk Maxwell (75)  |  Physical Science (54)  |  Relativity (50)  |  Step By Step (8)

I want to argue that the ‘sudden’ appearance of species in the fossil record and our failure to note subsequent evolutionary change within them is the proper prediction of evolutionary theory as we understand it ... Evolutionary ‘sequences’ are not rungs on a ladder, but our retrospective reconstruction of a circuitous path running like a labyrinth, branch to branch, from the base of the bush to a lineage now surviving at its top.
…...
Science quotes on:  |  Appearance (77)  |  Argue (17)  |  Base (43)  |  Branch (61)  |  Bush (8)  |  Change (291)  |  Evolutionary (16)  |  Failure (118)  |  Fossil Record (4)  |  Labyrinth (9)  |  Ladder (7)  |  Lineage (2)  |  Note (22)  |  Path (59)  |  Prediction (67)  |  Proper (27)  |  Reconstruction (13)  |  Retrospective (3)  |  Run (33)  |  Sequence (32)  |  Species (181)  |  Subsequent (11)  |  Sudden (21)  |  Survive (28)  |  Top (20)  |  Understand (189)  |  Want (120)

I was pretty good in science. But again, because of the small budget, in science class we couldn't do experiments in order to prove theories. We just believed everything. Actually I think that class was call Religion. Religion was always an easy class. All you had to do was suspend the logic and reasoning you were taught in all the other classes.
In autobiography, Brain Droppings (1998), 227.
Science quotes on:  |  Belief (400)  |  Biography (227)  |  Budget (2)  |  Class (64)  |  Easiness (2)  |  Everything (120)  |  Experiment (543)  |  Good (228)  |  Logic (187)  |  Proof (192)  |  Reasoning (79)  |  School (87)  |  Science (1699)  |  Science And Religion (267)  |  Suspension (5)  |  Teaching (99)

I was there when Abbe Georges Lemaître first proposed this [Big Bang] theory. ... There is no rational reason to doubt that the universe has existed indefinitely, for an infinite time. .... It is only myth that attempts to say how the universe came to be, either four thousand or twenty billion years ago.
[Expressing his belief that the Big Bang is a myth devised to explain creation. He said he heard Lemaître (who was, at the time both a member of the Catholic hierarchy and an accomplished scientist) say in private that this theory was a way to reconcile science with St. Thomas Aquinas' theological dictum of creatio ex nihilo—creation out of nothing.]
Quoted in Anthony L. Peratt, 'Dean of the Plasma Dissidents', Washington Times, supplement: The World and I (May 1988),196.
Science quotes on:  |  Saint Thomas Aquinas (15)  |  Attempt (94)  |  Big Bang (38)  |  Creatio Ex Nihilo (2)  |  Creation (211)  |  Dictum (5)  |  Doubt (121)  |  Exist (89)  |  Indefinitely (9)  |  Infinite (88)  |  Monsignor Georges Lemaître (5)  |  Myth (43)  |  Rational (42)  |  Reason (330)  |  Theology (35)  |  Time (439)  |  Universe (563)

I was very impressed that one simple theory could incorporate so much physics
Alan Guth
…...
Science quotes on:  |  Impressed (10)  |  Incorporate (3)  |  Physics (301)  |  Simple (111)

I will simply express my strong belief, that that point of self-education which consists in teaching the mind to resist its desires and inclinations, until they are proved to be right, is the most important of all, not only in things of natural philosophy, but in every department of dally life.
'Observations On Mental Education', a lecture before the Prince Consort and the Royal Institution, 6 May 1854. Experimental researches in chemistry and physics (1859), 477.
Science quotes on:  |  Criticism (52)

If all this damned quantum jumping were really here to stay, I should be sorry, I should be sorry I ever got involved with quantum theory.
As reported by Heisenberg describing Schrödinger’s time spent debating with Bohr in Copenhagen (Sep 1926). In Werner Heisenberg, Physics and Beyond: Encounters and Conversations (1971), 75. As cited in John Gribbin, Erwin Schrodinger and the Quantum Revolution.
Science quotes on:  |  Damned (4)  |  Involvement (4)  |  Quantum Mechanics (31)  |  Sorry (16)

If an idea presents itself to us, we must not reject it simply because it does not agree with the logical deductions of a reigning theory.
Science quotes on:  |  Deduction (49)  |  Hypothesis (227)  |  Idea (440)  |  Logic (187)  |  Reject (21)

If Darwin were alive today the insect world would delight and astound him with its impressive verification of his theories of the survival of the fittest. Under the stress of intensive chemical spraying the weaker members of the insect populations are being weeded out… . Only the strong and fit remain to defy our efforts to control them.
Science quotes on:  |  Astound (3)  |  Chemical (72)  |  Control (93)  |  Charles Darwin (284)  |  Defy (5)  |  Delight (51)  |  Effort (94)  |  Entomology (5)  |  Impressive (11)  |  Insect (57)  |  Intensive (7)  |  Population (71)  |  Remain (77)  |  Spray (4)  |  Strong (47)  |  Survival Of The Fittest (34)  |  Verification (20)  |  Weak (36)  |  Weed (14)

If faith cannot be reconciled with rational thinking, it has to be eliminated as an anachronistic remnant of earlier stages of culture and replaced by science dealing with facts and theories which are intelligible and can be validated.
…...
Science quotes on:  |  Culture (85)  |  Deal (25)  |  Early (39)  |  Eliminate (15)  |  Fact (609)  |  Faith (131)  |  Intelligible (10)  |  Rational (42)  |  Reconcile (10)  |  Remnant (2)  |  Replace (16)  |  Science (1699)  |  Stage (39)  |  Think (205)

If he [Thomas Edison] had a needle to find in a haystack, he would not stop to reason where it was most likely to be, but would proceed at once with the feverish diligence of a bee, to examine straw after straw until he found the object of his search. … [J]ust a little theory and calculation would have saved him ninety percent of his labor.
As quoted in 'Tesla Says Edison Was an Empiricist', The New York Times (19 Oct 1931), 25. In 1884, Tesla had moved to America to assist Edison in the designing of motors and generators.
Science quotes on:  |  Bee (21)  |  Calculation (67)  |  Diligence (14)  |  Thomas Edison (74)  |  Examine (24)  |  Feverish (2)  |  Labor (53)  |  Needle (5)  |  Proceed (25)  |  Reason (330)  |  Saving (19)  |  Search (85)  |  Straw (5)

If history is any guide at all, it seems to me to suggest that there is a final theory. In this century we have seen a convergence of the arrows of explanation, like the convergence of meridians toward the North Pole.
In Dreams of a Final Theory: The Scientist's Search for the Ultimate Laws of Nature (1992), 232.
Science quotes on:  |  20th Century (25)  |  Arrow (13)  |  Convergence (3)  |  Explanation (161)  |  Final (33)  |  Guide (46)  |  History (302)  |  Meridian (3)  |  North Pole (3)

If in a discussion of many matters … we are not able to give perfectly exact and self-consistent accounts, do not be surprised: rather we would be content if we provide accounts that are second to none in probability.
Plato
Timaeus. Quoted in Robert J. Scully, The Demon and the Quantum (2007), 20.

If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous, successive slight modifications, my theory would absolutely break down.
From On the Origin of Species by Means of Natural Selection; or, The Preservation of Favoured Races in the Struggle for Life (1861), 171.
Science quotes on:  |  Evolution (482)

If the aim of physical theories is to explain experimental laws, theoretical physics is not an autonomous science; it is subordinate to metaphysics.
The Aim and Structure of Physical Theory (1906), 2nd edition (1914), trans. Philip P. Wiener (1954), 10.
Science quotes on:  |  Experiment (543)  |  Law (418)  |  Physics (301)

If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors into ridiculous conclusions.
Feynman Lectures on Gravitation, edited by Brian Hatfield (2002), 21.
Science quotes on:  |  Conclusion (120)  |  Convert (15)  |  Definition (152)  |  Mathematics (587)  |  Ridiculous (9)  |  Rigor (12)

If this plane were to crash, we could get a new start on this quasar problem.
Said to colleagues, dramatically cupping his hand over his brow, shortly after the take-off of a propeller plane leaving Austin, Texas, after the Second Texas Symposium for Relativistic Astrophysics in Dec 1964. Various different theories had been presented at the conference. The flight passengers included many of the major scientists in quasar research, including Margaret and Geoffrey Burbridge, Subrahmanyan Chandrasekhar, John Wheeler and Maarten Schmidt.
As quoted by Arthur I. Miller, Empire of the Stars (2005), 226.
Science quotes on:  |  Airplane (32)  |  Subrahmanyan Chandrasekhar (7)  |  Crash (8)  |  Quasar (4)  |  Maarten Schmidt (2)  |  John Wheeler (38)

If we do discover a complete theory, it should be in time understandable in broad principle by everyone ... Then we shall all, philosophers, scientists and just ordinary people, be able to take part in the discussion of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason—for then we would know the mind of God.
A Brief History of Time (1988), 191.
Science quotes on:  |  Answer (201)  |  Complete (43)  |  Discovery (591)  |  Discussion (37)  |  Exist (89)  |  God (454)  |  Layman (13)  |  Philosopher (132)  |  Principle (228)  |  Reason (330)  |  Scientist (447)  |  Triumph (33)  |  Understanding (317)  |  Universe (563)

If we look at the problems raised by Aristotle, we are astonished at his gift of observation. What wonderful eyes the Greeks had for many things! Only they committed the mistake of being overhasty, of passing straightway from the phenomenon to the explanation of it, and thereby produced certain theories that are quite inadequate. But this is the mistake of all times, and still made in our own day.
In The Maxims and Reflections of Goethe (1906), 195.
Science quotes on:  |  Aristotle (141)  |  Astonished (4)  |  Commit (17)  |  Explanation (161)  |  Eye (159)  |  Gift (47)  |  Greek (46)  |  Hasty (4)  |  Inadequate (13)  |  Mistake (107)  |  Observation (418)  |  Pass (60)  |  Phenomenon (218)  |  Problem (362)  |  Produce (63)  |  Straightway (2)  |  Wonderful (37)

If you are out to describe the truth, leave elegance to the tailor.
On being reproached that his formula of gravitation was longer and more cumbersome than Newton’s.
Quoted in J. H. Mitchell, Writing for Professional and Technical Journals (1968), Introduction.
Science quotes on:  |  Gravity (89)

In 1975, ... [speaking with Shiing Shen Chern], I told him I had finally learned ... the beauty of fiber-bundle theory and the profound Chern-Weil theorem. I said I found it amazing that gauge fields are exactly connections on fiber bundles, which the mathematicians developed without reference to the physical world. I added, “this is both thrilling and puzzling, since you mathematicians dreamed up these concepts out of nowhere.” He immediately protested: “No, no. These concepts were not dreamed up. They were natural and real.”
In 'Einstein's Impact on Theoretical Physics', collected in Jong-Ping Hsu, Leonard Hsu (eds.), JingShin Theoretical Physics Symposium in Honor of Professor Ta-You Wu (1998), 70. Reprinted from Physics Today (Jun 1980), 49. The article was adapted from a talk given at the Second Marcel Grossman meeting, held in Trieste, Italy (Jul 1979), in honor of the 100th anniversary of the birth of Albert Einstein.
Science quotes on:  |  Amazing (16)  |  Beautiful (81)  |  Concept (102)  |  Develop (55)  |  Dreamed Up (2)  |  Immediately (9)  |  Mathematician (177)  |  Natural (128)  |  Nowhere (19)  |  Physical World (6)  |  Protest (4)  |  Puzzling (2)  |  Real (95)  |  Thrill (14)

In theory there is no difference between theory and practice; but in practice, there is.
Attributed. Although widely seen, a reliable source is never cited. If you know a primary print source, please contact Webmaster. Occasionally also seen attributed to Yogi Berra, Chuck Reid, Grant Gainey or Jerry Percell. The earliest example found by Webmaster is in Walter J. Savitch, An Introduction to the Art and Science of Programming (1986), where it is merely attributed as "Remark overheard at a computer science conference."
Science quotes on:  |  Difference (208)  |  Practice (67)

In a sense, of course, probability theory in the form of the simple laws of chance is the key to the analysis of warfare;… My own experience of actual operational research work, has however, shown that its is generally possible to avoid using anything more sophisticated. … In fact the wise operational research worker attempts to concentrate his efforts in finding results which are so obvious as not to need elaborate statistical methods to demonstrate their truth. In this sense advanced probability theory is something one has to know about in order to avoid having to use it.
In 'Operations Research', Physics Today (Nov 1951), 19. As cited by Maurice W. Kirby and Jonathan Rosenhead, 'Patrick Blackett (1897)' in Arjang A. Assad (ed.) and Saul I. Gass (ed.),Profiles in Operations Research: Pioneers and Innovators (2011), 25.
Science quotes on:  |  Advanced (10)  |  Analysis (123)  |  Chance (122)  |  Concentrate (11)  |  Demonstrate (25)  |  Effort (94)  |  Elaborate (13)  |  Experience (268)  |  Finding (30)  |  Key (38)  |  Law (418)  |  Method (154)  |  Obvious (54)  |  Probability (83)  |  Result (250)  |  Simple (111)  |  Sophisticated (11)  |  Statistics (125)  |  Truth (750)  |  Warfare (6)  |  Wise (43)

In an enterprise such as the building of the atomic bomb the difference between ideas, hopes, suggestions and theoretical calculations, and solid numbers based on measurement, is paramount. All the committees, the politicking and the plans would have come to naught if a few unpredictable nuclear cross sections had been different from what they are by a factor of two.
Epigraph in Richard Rhodes, The Making of the Atomic Bomb (1986), 8.
Science quotes on:  |  Atomic Bomb (101)  |  Building (51)  |  Calculation (67)  |  Committee (8)  |  Difference (208)  |  Enterprise (20)  |  Factor (34)  |  Hope (129)  |  Idea (440)  |  Measurement (148)  |  Nuclear (24)  |  Number (179)  |  Paramount (6)  |  Plan (69)  |  Politics (77)  |  Suggestion (24)  |  Unpredictable (10)

In chemistry, our theories are crutches; to show that they are valid, they must be used to walk... A theory established with the help of twenty facts must explain thirty, and lead to the discovery of ten more.
Leçons sur la Philosophie Chimique (1837), 60. Trans. S. Kapoor, 'Dumas and Organic Classification', Ambix, 1969, 16, 4.
Science quotes on:  |  Fact (609)

In Darwin’s theory, you just have to substitute ‘mutations’ for his ‘slight accidental variations’ (just as quantum theory substitutes ‘quantum jump’ for ‘continuous transfer of energy’). In all other respects little change was necessary in Darwin’s theory.
…...
Science quotes on:  |  Accidental (3)  |  Change (291)  |  Continuous (24)  |  Darwins (5)  |  Energy (185)  |  Jump (13)  |  Little (126)  |  Mutation (25)  |  Necessary (89)  |  Quantum (12)  |  Quantum Theory (55)  |  Respect (57)  |  Slight (18)  |  Substitute (23)  |  Transfer (8)  |  Variation (50)

In fact, Gentlemen, no geometry without arithmetic, no mechanics without geometry... you cannot count upon success, if your mind is not sufficiently exercised on the forms and demonstrations of geometry, on the theories and calculations of arithmetic ... In a word, the theory of proportions is for industrial teaching, what algebra is for the most elevated mathematical teaching.
... a l'ouverture du cours de mechanique industrielle á Metz (1827), 2-3, trans. Ivor Grattan-Guinness.
Science quotes on:  |  Algebra (36)  |  Arithmetic (68)  |  Calculation (67)  |  Demonstration (51)  |  Elevation (4)  |  Exercise (35)  |  Form (210)  |  Gentlemen (4)  |  Geometry (99)  |  Industry (91)  |  Mathematics (587)  |  Mechanics (44)  |  Mind (544)  |  Proportion (47)  |  Success (202)  |  Teaching (99)  |  Word (221)

In general, a fact is worth more than theories in the long run. The theory stimulates, but the fact builds. The former in due time is replaced by one better but the fact remains and becomes fertile.
Letter to Dr. E. B. Krumhaar (11 Oct 1933), in Journal of Bacteriology (Jan 1934), 27, No. 1, 20.
Science quotes on:  |  Better (131)  |  Building (51)  |  Fact (609)  |  Fertility (11)  |  Remaining (13)  |  Replacement (8)  |  Stimulation (12)

In general, art has preceded science. Men have executed great, and curious, and beautiful works before they had a scientific insight into the principles on which the success of their labours was founded. There were good artificers in brass and iron before the principles of the chemistry of metals were known; there was wine among men before there was a philosophy of vinous fermentation; there were mighty masses raised into the air, cyclopean walls and cromlechs, obelisks and pyramids—probably gigantic Doric pillars and entablatures—before there was a theory of the mechanical powers. … Art was the mother of Science.
Lecture (26 Nov 1851), to the London Society of Arts, 'The General Bearing of the Great Exhibition on the Progress of Art and Science', collected in Lectures on the Results of the Great Exhibition of 1851' (1852), 7-8.
Science quotes on:  |  Air (151)  |  Beautiful (81)  |  Brass (4)  |  Chemistry (239)  |  Construction (69)  |  Curious (24)  |  Fermentation (14)  |  Founded (10)  |  Great (300)  |  Insight (57)  |  Iron (53)  |  Knowledge (1128)  |  Labour (36)  |  Mass (61)  |  Mechanics (44)  |  Metal (38)  |  Mother (59)  |  Philosophy (213)  |  Pillar (7)  |  Preceding (8)  |  Principle (228)  |  Pyramid (7)  |  Raised (3)  |  Science And Art (157)  |  Success (202)  |  Wall (20)  |  Wine (23)  |  Work (457)

In less than eight years “The Origin of Species” has produced conviction in the minds of a majority of the most eminent living men of science. New facts, new problems, new difficulties as they arise are accepted, solved, or removed by this theory; and its principles are illustrated by the progress and conclusions of every well established branch of human knowledge.
From a review of four books on the subject 'Mimicry, and Other Protective Resemblances Among Animals', in The Westminster Review (Jul 1867), 88, 1. Wallace is identified as the author in the article as reprinted in William Beebe, The Book of Naturalists: An Anthology of the Best Natural History (1988), 108.
Science quotes on:  |  Acceptance (41)  |  Branch (61)  |  Conclusion (120)  |  Conviction (57)  |  Difficulty (113)  |  Eminence (11)  |  Establishment (29)  |  Fact (609)  |  Illustration (24)  |  Knowledge (1128)  |  Majority (32)  |  Men Of Science (97)  |  Mind (544)  |  New (340)  |  Origin Of Species (39)  |  Principle (228)  |  Problem (362)  |  Production (105)  |  Progress (317)  |  Removal (10)  |  Solution (168)

In my intercourse with mankind, I have always found those who would thrust theory into practical matters to be, at bottom, men of no judgement and pure quacks.
Quoted in James Kip Finch, Engineering Classics of James Kip Finch.
Science quotes on:  |  Engineering (115)

In my own view, some advice about what should be known, about what technical education should be acquired, about the intense motivation needed to succeed, and about the carelessness and inclination toward bias that must be avoided is far more useful than all the rules and warnings of theoretical logic.
From Reglas y Consejos sobre Investigacíon Cientifica: Los tónicos de la voluntad. (1897), as translated by Neely and Larry W. Swanson, in Advice for a Young Investigator (1999), 6.
Science quotes on:  |  Acquisition (32)  |  Advice (33)  |  Avoidance (9)  |  Bias (15)  |  Carelessness (4)  |  Education (280)  |  Inclination (20)  |  Intensity (19)  |  Knowledge (1128)  |  Logic (187)  |  Motivation (21)  |  Rule (135)  |  Technology (199)  |  Usefulness (70)  |  View (115)  |  Warning (10)

In our day grand generalizations have been reached. The theory of the origin of species is but one of them. Another, of still wider grasp and more radical significance, is the doctrine of the Conservation of Energy, the ultimate philosophical issues of which are as yet but dimly seem-that doctrine which “binds nature fast in fate” to an extent not hitherto recognized, exacting from every antecedent its equivalent consequent, and bringing vital as well as physical phenomena under the dominion of that law of causal connexion which, so far as the human understanding has yet pierced, asserts itself everywhere in nature.
'Address Delivered Before The British Association Assembled at Belfast', (19 Aug 1874). Fragments of Science for Unscientific People: A Series of Detached Essays, Lectures, and Reviews (1892), Vol. 2, 1801.
Science quotes on:  |  Antecedent (3)  |  Assertion (23)  |  Binding (8)  |  Bringing (10)  |  Cause (231)  |  Connection (86)  |  Consequence (76)  |  Conservation Of Energy (25)  |  Doctrine (53)  |  Dominion (6)  |  Equivalent (14)  |  Everywhere (14)  |  Exacting (2)  |  Extent (30)  |  Fate (38)  |  Generalization (26)  |  Grandness (2)  |  Grasp (43)  |  Human (445)  |  Issue (37)  |  Law (418)  |  Nature (1029)  |  Origin Of Species (39)  |  Phenomenon (218)  |  Philosophy (213)  |  Physics (301)  |  Radical (17)  |  Reach (68)  |  Recognition (62)  |  Seeing (48)  |  Significance (60)  |  Ultimate (61)  |  Understanding (317)  |  Vitality (10)

In point of fact, no conclusive disproof of a theory can ever be produced; for it is always possible to say that the experimental results are not reliable or that the discrepancies which are asserted to exist between the experimental results and the theory are only apparent and that they will disappear with the advance of our understanding. If you insist on strict proof (or strict disproof) in the empirical sciences, you will never benefit from experience, and never learn from it how wrong you are.
The Logic of Scientific Discovery: Logik Der Forschung (2002), 28.
Science quotes on:  |  Experiment (543)  |  Proof (192)  |  Result (250)

In science “fact” can only mean “confirmed to such a degree that it would be perverse to withhold provisional assent.” I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms.
'Evolution as Fact and Theory', in Hen’s Teeth and Horse’s Toes: Further Reflections in Natural History (1983), 255.
Science quotes on:  |  Apple (33)  |  Evolution (482)  |  Fact (609)

In scientific study, or, as I prefer to phrase it, in creative scholarship, the truth is the single end sought; all yields to that. The truth is supreme, not only in the vague mystical sense in which that expression has come to be a platitude, but in a special, definite, concrete sense. Facts and the immediate and necessary inductions from facts displace all pre-conceptions, all deductions from general principles, all favourite theories. Previous mental constructions are bowled over as childish play-structures by facts as they come rolling into the mind. The dearest doctrines, the most fascinating hypotheses, the most cherished creations of the reason and of the imagination perish from a mind thoroughly inspired with the scientific spirit in the presence of incompatible facts. Previous intellectual affections are crushed without hesitation and without remorse. Facts are placed before reasonings and before ideals, even though the reasonings and the ideals be more beautiful, be seemingly more lofty, be seemingly better, be seemingly truer. The seemingly absurd and the seemingly impossible are sometimes true. The scientific disposition is to accept facts upon evidence, however absurd they may appear to our pre-conceptions.
The Ethical Functions of Scientific Study: An Address Delivered at the Annual Commencement of the University of Michigan, 28 June 1888, 7-8.
Science quotes on:  |  Evidence (157)  |  Fact (609)  |  Hypothesis (227)  |  Scientific Method (155)  |  Truth (750)

In the 1860s, Pasteur not only applied his germ theory to create “Pasteurization,” rescuing France’s wine and vinegar industries, but also found both the cause and cure of silkworm disease, saving growers millions of dollars. When Napoleon asked the scientist why he had not legitimately profited by his findings, Pasteur replied: “In France scientists would consider they lowered themselves by doing so.”
In Jacques Cousteau and Susan Schiefelbein, The Human, the Orchid, and the Octopus: Exploring and Conserving Our Natural World (2007), 190.
Science quotes on:  |  Apply (38)  |  Ask (99)  |  Boneparte_Napoleon (2)  |  Cause (231)  |  Consider (45)  |  Create (98)  |  Cure (88)  |  Discover (115)  |  Disease (257)  |  Dollar (19)  |  France (21)  |  Germ (27)  |  Industry (91)  |  Legitimate (8)  |  Lower (11)  |  Million (89)  |  Louis Pasteur (79)  |  Profit (28)  |  Reply (18)  |  Rescue (8)  |  Scientist (447)  |  Vinegar (5)  |  Wine (23)

In the expressions we adopt to prescribe physical phenomena we necessarily hover between two extremes. We either have to choose a word which implies more than we can prove, or we have to use vague and general terms which hide the essential point, instead of bringing it out. The history of electrical theories furnishes a good example.
Opening Address to the Annual Meeting of the British Association by Prof. Arthur Schuster, in Nature (4 Aug 1892), 46, 325.
Science quotes on:  |  Choice (64)  |  Electricity (121)  |  Essential (87)  |  Example (57)  |  Expression (82)  |  Extreme (36)  |  Furnish (18)  |  Generality (22)  |  Good (228)  |  Hiding (6)  |  History (302)  |  Hover (3)  |  Implication (14)  |  Nomenclature (129)  |  Phenomenon (218)  |  Point (72)  |  Proof (192)  |  Term (87)  |  Vagueness (8)  |  Word (221)

In the field of thinking, the whole history of science from geocentrism to the Copernican revolution, from the false absolutes of Aristotle’s physics to the relativity of Galileo’s principle of inertia and to Einstein’s theory of relativity, shows that it has taken centuries to liberate us from the systematic errors, from the illusions caused by the immediate point of view as opposed to “decentered” systematic thinking.
As quoted in D. E. Berlyne, Structure and Direction in Thinking (1965), 232.
Science quotes on:  |  Absolute (65)  |  Aristotle (141)  |  Century (94)  |  Decentered (2)  |  Albert Einstein (535)  |  Error (230)  |  False (79)  |  Galileo Galilei (101)  |  History Of Science (53)  |  Illusion (38)  |  Inertia (10)  |  Liberate (8)  |  Oppose (16)  |  Physics (301)  |  Point Of View (26)  |  Principle (228)  |  Relativity (50)  |  Systematic (25)

In the year 1666 he retired again from Cambridge... to his mother in Lincolnshire & whilst he was musing in a garden it came into his thought that the power of gravity (wch brought an apple from the tree to the ground) was not limited to a certain distance from the earth but that this power must extend much farther than was usually thought. Why not as high as the moon said he to himself & if so that must influence her motion & perhaps retain her in her orbit, whereupon he fell a calculating what would be the effect of that supposition but being absent from books & taking the common estimate in use among Geographers & our seamen before Norwood had measured the earth, that 60 English miles were contained in one degree of latitude on the surface of the Earth his computation did not agree with his theory & inclined him then to entertain a notion that together with the force of gravity there might be a mixture of that force wch the moon would have if it was carried along in a vortex.
[The earliest account of Newton, gravity and an apple.]
Memorandum of a conversation with Newton in August 1726. Quoted in Richard Westfall, Never at Rest: A Biography of Isaac Newton (1980), 154.
Science quotes on:  |  Absent (3)  |  Apple (33)  |  Calculation (67)  |  Computation (11)  |  Earth (487)  |  Effect (133)  |  Estimate (19)  |  Force (194)  |  Garden (23)  |  Gravity (89)  |  Ground (63)  |  Mixture (22)  |  Moon (132)  |  Motion (127)  |  Sir Isaac Newton (258)  |  Notion (32)  |  Orbit (58)  |  Supposition (33)  |  Tree (143)  |  Vortex (3)

In the year 1902 (while I was attempting to explain to an elementary class in chemistry some of the ideas involved in the periodic law) becoming interested in the new theory of the electron, and combining this idea with those which are implied in the periodic classification, I formed an idea of the inner structure of the atom which, although it contained certain crudities, I have ever since regarded as representing essentially the arrangement of electrons in the atom ... In accordance with the idea of Mendeleef, that hydrogen is the first member of a full period, I erroneously assumed helium to have a shell of eight electrons. Regarding the disposition in the positive charge which balanced the electrons in the neutral atom, my ideas were very vague; I believed I inclined at that time toward the idea that the positive charge was also made up of discrete particles, the localization of which determined the localization of the electrons.
Valence and the Structure of Atoms and Molecules (1923), 29-30.
Science quotes on:  |  Atomic Structure (3)  |  Charge (29)  |  Electron (66)  |  Helium (7)  |  Hydrogen (37)  |  Period (49)

In theory one is aware that the earth revolves but in practice one does not perceive it, the ground on which one treads seems not to move, and one can live undisturbed. So it is with Time in one's life. (1918)
'À l’ombre des jeunes filles en fleurs', À la recherche du temps perdu (1913-27).
Science quotes on:  |  Earth (487)  |  Ground (63)  |  Move (58)  |  Perceive (18)  |  Revolve (6)  |  Time (439)

In these researches I followed the principles of the experimental method that we have established, i.e., that, in presence of a well-noted, new fact which contradicts a theory, instead of keeping the theory and abandoning the fact, I should keep and study the fact, and I hastened to give up the theory.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 164.
Science quotes on:  |  Abandon (37)  |  Contradiction (44)  |  Establishment (29)  |  Experiment (543)  |  Fact (609)  |  Following (16)  |  Give Up (4)  |  Keeping (9)  |  New (340)  |  Presence (26)  |  Principle (228)  |  Research (517)  |  Scientific Method (155)  |  Study (331)

Louis Agassiz quote: In-depth studies have an influence on general ideas, whereas theories, in turn, in order to maintain themse
In-depth studies have an influence on general ideas, whereas theories, in turn, in order to maintain themselves, push their spectators to search for new evidence. The mind's activity that is maintained by the debates about these works, is probably the source of the greatest joys given to man to experience on Earth.
La théorie des glaciers et ses progrès les plus récents. Bibl. universelle de Geneve, (3), Vol. 41, p. 139. Trans. Karin Verrecchia.
Science quotes on:  |  Geology (187)

Indeed, the most important part of engineering work—and also of other scientific work—is the determination of the method of attacking the problem, whatever it may be, whether an experimental investigation, or a theoretical calculation. … It is by the choice of a suitable method of attack, that intricate problems are reduced to simple phenomena, and then easily solved.
In Engineering Mathematics: A Series of Lectures Delivered at Union College (1911, 1917), Vol. 2, 275.
Science quotes on:  |  Attack (29)  |  Calculation (67)  |  Choice (64)  |  Determination (53)  |  Ease (29)  |  Engineering (115)  |  Experiment (543)  |  Intricacy (6)  |  Investigation (123)  |  Method (154)  |  Phenomenon (218)  |  Problem (362)  |  Reduction (35)  |  Science (1699)  |  Simplicity (126)  |  Suitability (11)  |  Work (457)

Is evolution a theory, a system or a hypothesis? It is much more: it is a general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforth if they are to be thinkable and true. Evolution is a light illuminating all facts, a curve that all lines must follow. ... The consciousness of each of us is evolution looking at itself and reflecting upon itself....Man is not the center of the universe as once we thought in our simplicity, but something much more wonderful—the arrow pointing the way to the final unification of the world in terms of life. Man alone constitutes the last-born, the freshest, the most complicated, the most subtle of all the successive layers of life. ... The universe has always been in motion and at this moment continues to be in motion. But will it still be in motion tomorrow? ... What makes the world in which we live specifically modern is our discovery in it and around it of evolution. ... Thus in all probability, between our modern earth and the ultimate earth, there stretches an immense period, characterized not by a slowing-down but a speeding up and by the definitive florescence of the forces of evolution along the line of the human shoot.
In The Phenomenon of Man (1975), pp 218, 220, 223, 227, 228, 277.
Science quotes on:  |  Arrow (13)  |  Bow (9)  |  Center (30)  |  Characterize (9)  |  Complicated (38)  |  Condition (119)  |  Consciousness (71)  |  Constitute (19)  |  Curve (16)  |  Definitive (2)  |  Discovery (591)  |  Earth (487)  |  Evolution (482)  |  Fact (609)  |  Final (33)  |  Follow (66)  |  General (92)  |  Human (445)  |  Hypothesis (227)  |  Illuminating (3)  |  Immense (28)  |  Layer (14)  |  Life (917)  |  Light (246)  |  Line (44)  |  Live (186)  |  Looking (25)  |  Modern (104)  |  Moment (61)  |  Motion (127)  |  Period (49)  |  Pointing (4)  |  Probability (83)  |  Reflecting (3)  |  Satisfy (14)  |  Shoot (10)  |  Simplicity (126)  |  Subtle (26)  |  Successive (14)  |  System (141)  |  Term (87)  |  Thought (374)  |  Tomorrow (29)  |  True (120)  |  Ultimate (61)  |  Unification (9)  |  Universe (563)  |  Wonderful (37)  |  World (667)

Is it not true that the doctrine of attraction and gravity has done nothing but astonish our imagination? Is it not true that all chemical discoveries have done only the same?
Letter to Jean le Rond D'Alembert (7 Jan 1768). Collected in Correspondence: Letters Between Frederick II and M. D’Alembert (1789), 79, as translated by Thomas Holcroft.
Science quotes on:  |  Astonish (3)  |  Attraction (32)  |  Chemistry (239)  |  Discovery (591)  |  Doctrine (53)  |  Gravity (89)  |  Imagination (209)  |  Law Of Gravity (8)

It appears that anything you say about the way that theory and experiment may interact is likely to be correct, and anything you say about the way that theory and experiment must interact is likely to be wrong.
In Dreams of a Final Theory: The Scientist's Search for the Ultimate Laws of Nature (1992), 128.
Science quotes on:  |  Anything (8)  |  Appearance (77)  |  Correct (53)  |  Experiment (543)  |  Interaction (28)  |  Likely (23)  |  Must (2)  |  Say (126)  |  Way (36)  |  Wrong (116)

It does appear that on the whole a physicist… tries to reduce his theory at all times to as few parameters as possible and is inclined to feel that a theory is a “respectable” one, though by no means necessarily correct, if in principle it does offer reasonably specific means for its possible refutation. Moreover the physicist will generally arouse the irritation amongst fellow physicists if he is not prepared to abandon his theory when it clashes with subsequent experiments. On the other hand it would appear that the chemist regards theories—or perhaps better his theories (!) —as far less sacrosanct, and perhaps in extreme cases is prepared to modify them continually as each bit of new experimental evidence comes in.
'Discussion: Physics and Chemistry: Comments on Caldin's View of Chemistry', British Journal of the Philosophy of Science, 1960, 11, 222.
Science quotes on:  |  Abandon (37)  |  Arouse (8)  |  Chemistry (239)  |  Clash (7)  |  Continually (14)  |  Correct (53)  |  Evidence (157)  |  Experiment (543)  |  Irritation (2)  |  Modify (11)  |  Parameter (2)  |  Physicist (130)  |  Principle (228)  |  Reduce (32)  |  Refutation (10)  |  Scientific Method (155)

It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are. If it doesn’t agree with experiment, it’s wrong.
…...
Science quotes on:  |  Agree (19)  |  Beautiful (81)  |  Experiment (543)  |  Matter (270)  |  Smart (13)  |  Wrong (116)

It has been said by a distinguished philosopher that England is “usually the last to enter into the general movement of the European mind.” The author of the remark probably meant to assert that a man or a system may have become famous on the continent, while we are almost ignorant of the name of the man and the claims of his system. Perhaps, however, a wider range might be given to the assertion. An exploded theory or a disadvantageous practice, like a rebel or a patriot in distress, seeks refuge on our shores to spend its last days in comfort if not in splendour.
Opening from essay, 'Elementary Geometry', included in The Conflict of Studies and Other Essays (1873), 136.
Science quotes on:  |  Assert (11)  |  Assertion (23)  |  Author (39)  |  Claim (52)  |  Comfort (42)  |  Continent (39)  |  Distinguished (6)  |  Distress (5)  |  England (31)  |  Enter (20)  |  European (5)  |  Exploded (3)  |  Famous (4)  |  General (92)  |  Ignorant (27)  |  Mind (544)  |  Movement (65)  |  Name (118)  |  Patriot (3)  |  Philosopher (132)  |  Practice (67)  |  Rebel (4)  |  Refuge (12)  |  Remark (14)  |  Seek (57)  |  Spend (24)  |  Splendour (2)  |  System (141)

It has often been said that, to make discoveries, one must be ignorant. This opinion, mistaken in itself, nevertheless conceals a truth. It means that it is better to know nothing than to keep in mind fixed ideas based on theories whose confirmation we constantly seek, neglecting meanwhile everything that fails to agree with them.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 37.
Science quotes on:  |  Agreement (29)  |  Conceal (10)  |  Confirmation (15)  |  Discovery (591)  |  Failing (5)  |  Fixed (11)  |  Idea (440)  |  Ignorance (190)  |  Knowledge (1128)  |  Mistake (107)  |  Neglect (23)  |  Nothing (267)  |  Opinion (146)  |  Seeking (30)  |  Truth (750)

It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.
A Scandal in Bohemia (1891) in Adventures of Sherlock Holmes (1892), 5.
Science quotes on:  |  Beginning (114)  |  Capital (15)  |  Data (100)  |  Fact (609)  |  Mistake (107)  |  Suit (7)  |  Twisting (2)

It is a capital mistake to theorize before you have all the evidence. It biases the judgment.
A Study in Scarlet (1887), in Works of Arthur Conan Doyle (1902), Vol. 11, 39.
Science quotes on:  |  Bias (15)  |  Capital (15)  |  Evidence (157)  |  Judgment (72)  |  Mistake (107)

It is a constant struggle not to let the theory lead the science in the way that is most beneficial to one’s assumptions.
In U.S. News & World Report (1997), 123, 262.
Science quotes on:  |  Assumption (49)  |  Lead (101)  |  Science (1699)  |  Struggle (60)

It is a good thing Heaven has not given us the power to change as much of our body as we would like to or as our theory would assert is necessary.
Aphorism 34 in Notebook D (1773-1775), as translated by R.J. Hollingdale in Aphorisms (1990). Reprinted as The Waste Books (2000), 48.
Science quotes on:  |  Body (193)  |  Change (291)  |  Heaven (118)  |  Liking (4)  |  Necessity (125)  |  Power (273)

It is a test of true theories not only to account for but to predict phenomena.
Aphorism 12, 'Aphorisms Concerning Science', The Philosophy of the Inductive Sciences (1840), Vol. 1, xxxvi.
Science quotes on:  |  Account (45)  |  Phenomenon (218)  |  Predict (12)  |  Test (96)  |  True (120)

It is a vulgar belief that our astronomical knowledge dates only from the recent century when it was rescued from the monks who imprisoned Galileo; but Hipparchus … who among other achievements discovered the precession of the eqinoxes, ranks with the Newtons and the Keplers; and Copernicus, the modern father of our celestial science, avows himself, in his famous work, as only the champion of Pythagoras, whose system he enforces and illustrates. Even the most modish schemes of the day on the origin of things, which captivate as much by their novelty as their truth, may find their precursors in ancient sages, and after a careful analysis of the blended elements of imagination and induction which charaterise the new theories, they will be found mainly to rest on the atom of Epicurus and the monad of Thales. Scientific, like spiritual truth, has ever from the beginning been descending from heaven to man.
Lothair (1879), preface, xvii.
Science quotes on:  |  Astronomy (175)  |  Atom (251)  |  Nicolaus Copernicus (44)  |  Epicurus (6)  |  Galileo Galilei (101)  |  Hipparchus (3)  |  Imagination (209)  |  Imprison (8)  |  Johannes Kepler (72)  |  Sir Isaac Newton (258)  |  Pythagoras (27)  |  Thales (7)

It is always better to have no ideas than false ones; to believe nothing than to believe what is wrong.
In Letter (19 Jul 1788) to James Madison. Collected in Thomas Jefferson Randolph, Memoirs, Correspondence, and Private Papers of Thomas Jefferson (1829), Vol. 2, 223.
Science quotes on:  |  Belief (400)  |  False (79)  |  Idea (440)  |  Nothing (267)  |  Wrong (116)

It is an old saying, abundantly justified, that where sciences meet there growth occurs. It is true moreover to say that in scientific borderlands not only are facts gathered that [are] often new in kind, but it is in these regions that wholly new concepts arise. It is my own faith that just as the older biology from its faithful studies of external forms provided a new concept in the doctrine of evolution, so the new biology is yet fated to furnish entirely new fundamental concepts of science, at which physics and chemistry when concerned with the non-living alone could never arrive.
'Biological Thought and Chemical Thought: A Plea for Unification', Linacre Lecture, Cambridge (6 May 1938), published in Lancet (1938),2, 1204.
Science quotes on:  |  Biology (150)  |  Fact (609)  |  Growth (111)

It is curious how often erroneous theories have had a beneficial effect for particular branches of science.
The Growth of Biological Thought: Diversity, Evolution and Inheritance (1982), 847.
Science quotes on:  |  Beneficial (10)  |  Curiosity (89)  |  Effect (133)  |  Error (230)  |  Science (1699)

It is customary to connect Medicine with Botany, yet scientific treatment demands that we should consider each separately. For the fact is that in every art, theory must be disconnected and separated from practice, and the two must be dealt with singly and individually in their proper order before they are united. And for that reason, in order that Botany, which is, as it were, a special branch of Natural Philosophy [Physica], may form a unit by itself before it can be brought into connection with other sciences, it must be divided and unyoked from Medicine.
Methodi herbariae libri tres (1592), translated in Agnes Arber, Herbals: Their Origin and Evolution, 2nd edition (1938), 144.
Science quotes on:  |  Botany (47)  |  Divide (24)  |  Medicine (322)  |  Natural Philosophy (21)  |  Practice (67)  |  Treatment (88)  |  Unit (25)

It is difficult even to attach a precise meaning to the term “scientific truth.” So different is the meaning of the word “truth” according to whether we are dealing with a fact of experience, a mathematical proposition or a scientific theory. “Religious truth” conveys nothing clear to me at all.
From 'Scientific Truth' in Essays in Science (1934, 2004), 11.
Science quotes on:  |  Attach (8)  |  Clear (52)  |  Convey (10)  |  Different (110)  |  Difficult (62)  |  Experience (268)  |  Fact (609)  |  Mathematics (587)  |  Meaning (87)  |  Nothing (267)  |  Precise (17)  |  Proposition (47)  |  Religious (44)  |  Science And Religion (267)  |  Scientific (169)  |  Term (87)  |  Truth (750)  |  Word (221)

It is easy to make out three areas where scientists will be concentrating their efforts in the coming decades. One is in physics, where leading theorists are striving, with the help of experimentalists, to devise a single mathematical theory that embraces all the basic phenomena of matter and energy. The other two are in biology. Biologists—and the rest of us too—would like to know how the brain works and how a single cell, the fertilized egg cell, develops into an entire organism
Article 'The View From Mars', in Annals of the New York Academy of Sciences: Research Facilities of the Future (1994), 735, 37.
Science quotes on:  |  Basic (52)  |  Biologist (31)  |  Brain (181)  |  Cell (125)  |  Concentrate (11)  |  Decade (19)  |  Develop (55)  |  Devise (11)  |  Effort (94)  |  Egg (41)  |  Embrace (22)  |  Energy (185)  |  Entire (29)  |  Experimentalist (11)  |  Fertilized (2)  |  Know (321)  |  Mathematics (587)  |  Matter (270)  |  Organism (126)  |  Phenomena (8)  |  Physics (301)  |  Single (72)  |  Strive (35)  |  Theorist (24)

It is easy to obtain confirmations, or verifications, for nearly every theory—if we look for confirmations. Confirmations should count only if they are the result of risky predictions... A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think) but a vice. Every genuine test of a theory is an attempt to falsify it, or refute it.
Conjectures and Refutations: The Growth of Scientific Knowledge (1963), 36.
Science quotes on:  |  Attempt (94)  |  Conception (63)  |  Confirmation (15)  |  Ease (29)  |  Event (97)  |  Falsification (7)  |  Genuine (19)  |  Non-Scientific (4)  |  Prediction (67)  |  Refutation (10)  |  Result (250)  |  Risk (29)  |  Test (96)  |  Verification (20)  |  Vice (15)  |  Virtue (55)

It is going to be necessary that everything that happens in a finite volume of space and time would have to be analyzable with a finite number of logical operations. The present theory of physics is not that way, apparently. It allows space to go down into infinitesimal distances, wavelengths to get infinitely great, terms to be summed in infinite order, and so forth; and therefore, if this proposition [that physics is computer-simulatable] is right, physical law is wrong.
International Journal of Theoretical Physics (1982), 21 Nos. 6-7, 468. Quoted in Brian Rotman, Mathematics as Sign (2000), 82.
Science quotes on:  |  Analysis (123)  |  Computer (84)  |  Finite (22)  |  Infinite (88)  |  Infinitesimal (8)  |  Physical Law (3)  |  Physics (301)  |  Proposition (47)  |  Simulation (6)  |  Space (154)  |  Time (439)  |  Wavelength (5)

It is in scientific honesty that I endorse the presentation of alternative theories for the origin of the universe, life and man in the science classroom. It would be an error to overlook the possibility that the universe was planned rather than happening by chance.
In letter to California State board of Education (14 Sep 1972).
Science quotes on:  |  Alternative (22)  |  Chance (122)  |  Classroom (5)  |  Creationism (6)  |  Error (230)  |  Happening (32)  |  Honesty (16)  |  Life (917)  |  Man (345)  |  Origin Of The Universe (13)  |  Overlooking (3)  |  Plan (69)  |  Possibility (96)  |  School (87)  |  Science Education (11)  |  Universe (563)

It is more important to have beauty in one's equations than to have them fit experiment... It seems that if one is working from the point of view of getting beauty in one's equations, and if one has really a sound insight, one is on a sure line of progress. If there is not complete agreement between the results of one's work and experiment, one should not allow oneself to be too discouraged, because the discrepancy may well be due to minor features that are not properly taken into account and that will get cleared up with further developments of the theory.
In 'The Evolution of the Physicist’s Picture of Nature', Scientific American, May 1963, 208, 47.

It is not that we propose a theory and Nature may shout NO; rather, we propose a maze of theories, and Nature may shout INCONSISTENT.
'Falsification and the Methodology of Scientific Research Programmes', in I. Lakatos and A. Musgrave (eds.), Criticism and the Growth of Knowledge: Proceedings of the International Colloquium in the Philosophy of Science, London 1965 (1970), Vol. 4, 130.
Science quotes on:  |  Inconsistent (7)  |  Nature (1029)

It is often held that scientific hypotheses are constructed, and are to be constructed, only after a detailed weighing of all possible evidence bearing on the matter, and that then and only then may one consider, and still only tentatively, any hypotheses. This traditional view however, is largely incorrect, for not only is it absurdly impossible of application, but it is contradicted by the history of the development of any scientific theory. What happens in practice is that by intuitive insight, or other inexplicable inspiration, the theorist decides that certain features seem to him more important than others and capable of explanation by certain hypotheses. Then basing his study on these hypotheses the attempt is made to deduce their consequences. The successful pioneer of theoretical science is he whose intuitions yield hypotheses on which satisfactory theories can be built, and conversely for the unsuccessful (as judged from a purely scientific standpoint). Co-author with British astronomer, Raymond Arthur Lyttleton (1911-95).
In 'The Internal Constitution of the Stars', Occasional Notes of the Royal Astronomical Society 1948, 12, 90.
Science quotes on:  |  Deduction (49)  |  Hypothesis (227)  |  Insight (57)  |  Inspiration (50)  |  Intuition (39)  |  Scientific Method (155)

It is scientists, not sceptics, who are most willing to consider explanations that conflict with their own. And far from quashing dissent, it is the scientists, not the sceptics, who do most to acknowledge gaps in their studies and point out the limitations of their data—which is where sceptics get much of the mud they fling at the scientists. By contrast, the [sceptics] are not trying to build a theory of anything. They have set the bar much lower, and are happy muddying the waters.
Editorial, Nature (28 Jul 2011), 475, 423-424.
Science quotes on:  |  Acknowledgment (10)  |  Build (80)  |  Climate Change (56)  |  Conflict (49)  |  Consider (45)  |  Contrast (16)  |  Data (100)  |  Dissent (7)  |  Explanation (161)  |  Gap (20)  |  Global Warming (26)  |  Happiness (82)  |  Limitation (20)  |  Mud (14)  |  Scientist (447)  |  Skeptic (6)  |  Study (331)  |  Trying (18)  |  Water (244)  |  Willing (6)

It is the theory that decides what can be observed.
…...
Science quotes on:  |  Decide (25)  |  Observe (48)

It is with theories as with wells: you may see to the bottom of the deepest if there be any water there, while another shall pass for wondrous profound when ‘tis merely shallow, dark, and empty.
As quoted, citing only the author, in 'New Publications: Dr. Wigan', The Edinburgh Review: Or Critical Journal (Oct 1844), 80, 67.
Science quotes on:  |  Bottom (28)  |  Dark (49)  |  Deep (81)  |  Empty (26)  |  See (197)  |  Shallow (5)  |  Water (244)

It is … a sign of the times—though our brothers of physics and chemistry may smile to hear me say so—that biology is now a science in which theories can be devised: theories which lead to predictions and predictions which sometimes turn out to be correct. These facts confirm me in a belief I hold most passionately—that biology is the heir of all the sciences.
From Nobel Banquet speech (10 Dec 1960).
Science quotes on:  |  Biology (150)  |  Brother (16)  |  Chemistry (239)  |  Confirmation (15)  |  Correct (53)  |  Devised (3)  |  Fact (609)  |  Hearing (27)  |  Heir (6)  |  Leading (14)  |  Physics (301)  |  Prediction (67)  |  French Saying (61)  |  Science (1699)  |  Sign (36)  |  Smile (13)  |  Time (439)

It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory...
'On the Generalized Theory of Gravitation', Scientific American (Apr 1950), 13. In David H. Levy (Ed.), The Scientific American Book of the Cosmos (2000), 19.
Science quotes on:  |  Experience (268)  |  Hypothesis (227)  |  Knowledge (1128)  |  Proof (192)

It seems sensible to discard all hope of observing hitherto unobservable quantities, such as the position and period of the electron... Instead it seems more reasonable to try to establish a theoretical quantum mechanics, analogous to classical mechanics, but in which only relations between observable quantities occur.
In Helge Kragh, Quantum Generations: A History of Physics in the Twentieth Century (1999), 161.
Science quotes on:  |  Electron (66)  |  Observation (418)  |  Quantum Physics (16)

It seems that the rivers know the theory. It only remains to convince the engineers of the validity of this analysis.
Epigraph, without citation, in Péter Érdi, Complexity Explained (2007), 339. In French, “Il semble que les rivières connaissent déjà la théorie Il ne reste qu'à convaincre les ingénieurs de la validité de cette analyse.”
Science quotes on:  |  Analysis (123)  |  Convince (17)  |  Engineer (72)  |  Know (321)  |  River (68)  |  Seem (89)  |  Validity (22)

It seems to me, he says, that the test of “Do we or not understand a particular subject in physics?” is, “Can we make a mechanical model of it?” I have an immense admiration for Maxwell’s model of electromagnetic induction. He makes a model that does all the wonderful things that electricity docs in inducing currents, etc., and there can be no doubt that a mechanical model of that kind is immensely instructive and is a step towards a definite mechanical theory of electromagnetism.
From stenographic report by A.S. Hathaway of the Lecture 20 Kelvin presented at Johns Hopkins University, Baltimore, on 'Molecular Dynamics and the Wave Theory of Light' (1884), 132. (Hathaway was a Mathematics fellow there.) This remark is not included in the first typeset publication—a revised version, printed twenty years later, in 1904, as Lord Kelvin’s Baltimore Lectures on Molecular Dynamics and the Wave Theory of Light. The original notes were reproduced by the “papyrograph” process. They are excerpted in Pierre Maurice Marie Duhem, Essays in the History and Philosophy of Science (1996), 54-55.
Science quotes on:  |  Admiration (34)  |  Current (43)  |  Electricity (121)  |  Electromagnetism (17)  |  Induction (45)  |  Instruction (51)  |  James Clerk Maxwell (75)  |  Mechanics (44)  |  Model (64)  |  Understanding (317)

It surely can be no offence to state, that the progress of science has led to new views, and that the consequences that can be deduced from the knowledge of a hundred facts may be very different from those deducible from five. It is also possible that the facts first known may be the exceptions to a rule and not the rule itself, and generalisations from these first-known facts, though useful at the time, may be highly mischievous, and impede the progress of the science if retained when it has made some advance.
Sections and Views Illustrative of Geological Phenomena (1830), viii.
Science quotes on:  |  Fact (609)  |  Progress Of Science (20)

Just now nuclear physicists are writing a great deal about hypothetical particles called neutrinos supposed to account for certain peculiar facts observed in β-ray disintegration. We can perhaps best describe the neutrinos as little bits of spin-energy that have got detached. I am not much impressed by the neutrino theory. In an ordinary way I might say that I do not believe in neutrinos… But I have to reflect that a physicist may be an artist, and you never know where you are with artists. My old-fashioned kind of disbelief in neutrinos is scarcely enough. Dare I say that experimental physicists will not have sufficient ingenuity to make neutrinos? Whatever I may think, I am not going to be lured into a wager against the skill of experimenters under the impression that it is a wager against the truth of a theory. If they succeed in making neutrinos, perhaps even in developing industrial applications of them, I suppose I shall have to believe—though I may feel that they have not been playing quite fair.
From Tarner Lecture, 'Discovery or Manufacture?' (1938), in The Philosophy of Physical Science (1939, 2012), 112.
Science quotes on:  |  Experimental Physicist (8)  |  Neutrino (8)  |  Nuclear Physicist (2)

Langmuir is a regular thinking machine. Put in facts, and you get out a theory.
Quoted in C. Guy Suits (ed.), The Collected Works of Irving Langmuir (1962), Vol. 12, 6.
Science quotes on:  |  Fact (609)  |  Irving Langmuir (7)  |  Thinking (222)

Later scientific theories are better than earlier ones for solving puzzles in the often quite different environments to which they are applied. That is not a relativist's position, and it displays the sense in which I am a convinced believer in scientific progress.
The Structure of Scientific Revolutions, 2nd edition (1970), 206.
Science quotes on:  |  Application (117)  |  Environment (138)  |  Progress (317)  |  Puzzle (30)  |  Relativist (2)  |  Scientific Progress (12)  |  Sense (240)  |  Solution (168)

Let us award a just, a brilliant homage to those rare men whom nature has endowed with the precious privilege of arranging a thousand isolated facts, of making seductive theories spring from them; but let us not forget to state, that the scythe of the reaper had cut the stalks before one had thought of uniting them into sheaves!
In François Arago, trans. by William Henry Smyth, Baden Powell and Robert Grant, 'Fourier', Biographies of Distinguished Scientific Men (1859), Vol. 1, 409.
Science quotes on:  |  Arranging (3)  |  Cut (36)  |  Endowment (7)  |  Fact (609)  |  Homage (3)  |  Isolated (12)  |  Nature (1029)  |  Precious (22)  |  Privilege (16)  |  Rare (31)  |  Reaper (2)  |  Seductive (4)  |  Sheaf (2)  |  Spring (47)  |  Stalk (4)  |  Thought (374)  |  Thousand (106)  |  Uniting (4)

Let us now discuss the extent of the mathematical quality in Nature. According to the mechanistic scheme of physics or to its relativistic modification, one needs for the complete description of the universe not merely a complete system of equations of motion, but also a complete set of initial conditions, and it is only to the former of these that mathematical theories apply. The latter are considered to be not amenable to theoretical treatment and to be determinable only from observation.
From Lecture delivered on presentation of the James Scott prize, (6 Feb 1939), 'The Relation Between Mathematics And Physics', printed in Proceedings of the Royal Society of Edinburgh (1938-1939), 59, Part 2, 125.
Science quotes on:  |  Amenable (2)  |  Apply (38)  |  Complete (43)  |  Condition (119)  |  Description (72)  |  Determine (45)  |  Initial (13)  |  Mathematics (587)  |  Mechanistic (2)  |  Modification (31)  |  Nature (1029)  |  Observation (418)  |  Physics (301)  |  Quality (65)  |  Relativistic (2)  |  Scheme (20)  |  Set (56)  |  System (141)  |  Treatment (88)  |  Universe (563)

Let us now recapitulate all that has been said, and let us conclude that by hermetically sealing the vials, one is not always sure to prevent the birth of the animals in the infusions, boiled or done at room temperature, if the air inside has not felt the ravages of fire. If, on the contrary, this air has been powerfully heated, it will never allow the animals to be born, unless new air penetrates from outside into the vials. This means that it is indispensable for the production of the animals that they be provided with air which has not felt the action of fire. And as it would not be easy to prove that there were no tiny eggs disseminated and floating in the volume of air that the vials contain, it seems to me that suspicion regarding these eggs continues, and that trial by fire has not entirely done away with fears of their existence in the infusions. The partisans of the theory of ovaries will always have these fears and will not easily suffer anyone's undertaking to demolish them.
Nouvelles Recherches sur les Découvertes Microscopiques, et la Génération des Corps Organisés (1769), 134-5. Quoted in Jacques Roger, The Life Sciences in Eighteenth-Century French Thought, ed. Keith R. Benson and trans. Robert Ellrich (1997), 510-1.
Science quotes on:  |  Action (151)  |  Air (151)  |  Animal (309)  |  Birth (81)  |  Conclusion (120)  |  Contrary (22)  |  Demolition (4)  |  Dissemination (2)  |  Ease (29)  |  Egg (41)  |  Fear (113)  |  Fire (117)  |  Float (12)  |  Heat (90)  |  Hermetic (2)  |  Infusion (3)  |  Outside (37)  |  Partisan (4)  |  Pentration (2)  |  Prevention (29)  |  Production (105)  |  Proof (192)  |  Provision (15)  |  Ravage (6)  |  Recapitulation (2)  |  Seal (10)  |  Suffer (25)  |  Suspicion (25)  |  Undertaking (7)  |  Vial (3)

Marxism: The theory that all the important things in history are rooted in an economic motive, that history is a science, a science of the search for food.
From Daily News (31 Jul 1909). In Dale Ahlquist (ed.) The Universe According to G.K. Chesterton: A Dictionary of the Mad, Mundane and Metaphysical (2013), 71.
Science quotes on:  |  Economic (21)  |  Food (139)  |  History (302)  |  Important (124)  |  Marxism (3)  |  Motive (26)  |  Science (1699)  |  Search (85)

Mathematicians deal with possible worlds, with an infinite number of logically consistent systems. Observers explore the one particular world we inhabit. Between the two stands the theorist. He studies possible worlds but only those which are compatible with the information furnished by observers. In other words, theory attempts to segregate the minimum number of possible worlds which must include the actual world we inhabit. Then the observer, with new factual information, attempts to reduce the list further. And so it goes, observation and theory advancing together toward the common goal of science, knowledge of the structure and observation of the universe.
Lecture to Sigma Xi, 'The Problem of the Expanding Universe' (1941), printed in Sigma Xi Quarterly (1942), 30, 104-105. Reprinted in Smithsonian Institution Report of the Board of Regents (1943), 97, 123. As cited by Norriss S. Hetherington in 'Philosophical Values and Observation in Edwin Hubble's Choice of a Model of the Universe', Historical Studies in the Physical Sciences (1982), 13, No. 1, 63.
Science quotes on:  |  Actual (34)  |  Advance (123)  |  Attempt (94)  |  Common (92)  |  Compatibility (4)  |  Consistency (21)  |  Exploration (93)  |  Fact (609)  |  Goal (81)  |  Inclusion (5)  |  Infinite (88)  |  Information (102)  |  Knowledge (1128)  |  Logic (187)  |  Mathematician (177)  |  Minimum (10)  |  Number (179)  |  Observation (418)  |  Observer (33)  |  Reduction (35)  |  Science (1699)  |  Segregation (2)  |  Structure (191)  |  Study (331)  |  System (141)  |  Theorist (24)  |  Universe (563)  |  World (667)

Maxwell's theory is Maxwell's system of equations.
Electric Waves (1893), 21.

Men who believe too firmly in their theories, do not believe enough in the theories of others. So … these despisers of their fellows … make experiments only to destroy a theory, instead of to seek the truth.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 38.
Science quotes on:  |  Belief (400)  |  Despising (2)  |  Destroying (3)  |  Experiment (543)  |  Fellow (29)  |  Seeking (30)  |  Truth (750)

Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries; they also make very poor observations. Of necessity, they observe with a preconceived idea, and when they devise an experiment, they can see, in its results,only a confirmation of their theory. In this way they distort observation and often neglect very important facts because they do not further their aim.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 38.
Science quotes on:  |  Aim (58)  |  Confirmation (15)  |  Discovery (591)  |  Distortion (10)  |  Excessive (7)  |  Experiment (543)  |  Fact (609)  |  Faith (131)  |  Idea (440)  |  Importance (183)  |  Neglect (23)  |  Observation (418)  |  Poor (46)  |  Preconceived (3)  |  Preparation (33)  |  Result (250)

Men who have excessive faith in their theories … make poor observations, because they choose among the results of their experiments only what suits their object, neglecting whatever is unrelated to it and carefully setting aside everything which might tend toward the idea they wish to combat
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 38.
Science quotes on:  |  Care (73)  |  Choose (35)  |  Combat (9)  |  Excessive (7)  |  Experiment (543)  |  Faith (131)  |  Idea (440)  |  Ignoring (5)  |  Neglect (23)  |  Object (110)  |  Observation (418)  |  Poor (46)  |  Result (250)  |  Suit (7)  |  Tendency (40)  |  Unrelated (6)  |  Wish (62)

Modern theories did not arise from revolutionary ideas which have been, so to speak, introduced into the exact sciences from without. On the contrary they have forced their way into research which was attempting consistently to carry out the programme of classical physics—they arise out of its very nature. It is for this reason that the beginnings of modern physics cannot be compared with the great upheavals of previous periods like the achievements of Copernicus. Copernicus’s idea was much more an import from outside into the concepts of the science of his time, and therefore caused far more telling changes in science than the ideas of modern physics are creating to-day.
In Philosophical Problems of Nuclear Science: Eight Lectures (1952), 13.
Science quotes on:  |  Attempting (3)  |  Beginning (114)  |  Change (291)  |  Classical Physics (5)  |  Consistently (4)  |  Nicolaus Copernicus (44)  |  Idea (440)  |  Import (3)  |  Introduce (27)  |  Modern (104)  |  Nature (1029)  |  Programme (4)  |  Reason (330)  |  Research (517)  |  Revolution (56)  |  Upheaval (3)

MOLECULE, n. The ultimate, indivisible unit of matter. It is distinguished from the corpuscle, also the ultimate, indivisible unit of matter, by a closer resemblance to the atom, also the ultimate, indivisible unit of matter. Three great scientific theories of the structure of the universe are the molecular, the corpuscular and the atomic. A fourth affirms, with Haeckel, the condensation or precipitation of matter from ether—whose existence is proved by the condensation or precipitation. The present trend of scientific thought is toward the theory of ions. The ion differs from the molecule, the corpuscle and the atom in that it is an ion. A fifth theory is held by idiots, but it is doubtful if they know any more about the matter than the others.
The Collected Works of Ambrose Bierce (1911), Vol. 7, The Devil's Dictionary,  220-221.
Science quotes on:  |  Atom (251)  |  Humour (101)  |  Ion (8)  |  Molecule (125)

Morphological information has provided the greatest single source of data in the formulation and development of the theory of evolution and that even now, when the preponderance of work is experimental, the basis for interpretation in many areas of study remains the form and relationships of structures.
'Morphology, Paleontology, and Evolution', in Sol Tax (ed.), Evolution After Darwin, Vol. 1, The Evolution of Life (1960), 524.
Science quotes on:  |  Basis (60)  |  Data (100)  |  Development (228)  |  Evolution (482)  |  Experiment (543)  |  Form (210)  |  Formulation (20)  |  Information (102)  |  Interpretation (61)  |  Morphology (18)  |  Preponderance (2)  |  Provide (48)  |  Relationship (59)  |  Remain (77)  |  Source (71)  |  Structure (191)  |  Study (331)  |  Work (457)

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.
Co-authored with Leopold Infeld.
The Evolution of Physics: The Growth of Ideas from the Early Concepts to Relativity and Quanta (1938), 29. Infeld was a Polish physicist (1898-1968).

Most people like to believe something is or is not true. Great scientists tolerate ambiguity very well. They believe the theory enough to go ahead; they doubt it enough to notice the errors and faults so they can step forward and create the new replacement theory. If you believe too much you’ll never notice the flaws; if you doubt too much you won’t get started. It requires a lovely balance.
'You and Your Research', Bell Communications Research Colloquium Seminar, 7 Mar 1986.
Science quotes on:  |  Ambiguity (9)  |  Balance (43)  |  Belief (400)  |  Doubt (121)  |  Error (230)  |  Fault (27)  |  Greatness (34)  |  Notice (20)  |  Replacement (8)  |  Requirement (45)  |  Scientist (447)  |  Start (68)  |  Toleration (5)  |  Truth (750)

Mr Hooke sent, in his next letter [to Sir Isaac Newton] the whole of his Hypothesis, scil that the gravitation was reciprocall to the square of the distance: ... This is the greatest Discovery in Nature that ever was since the World's Creation. It was never so much as hinted by any man before. I wish he had writt plainer, and afforded a little more paper.
Brief Lives (1680), edited by Oliver Lawson Dick (1949), 166-7.
Science quotes on:  |  Gravitation (27)  |  Inverse Square Law (4)

Mr Justus Liebig is no doubt a very clever gentleman and a most profound chemist, but in our opinion he knows as much of agriculture as the horse that ploughs the ground, and there is not an old man that stands between the stilts of a plough in Virginia, that cannot tell him of facts totally at variance with his finest spun theories.
Magazine
The Southern Planter (1845), 3, 23.
Science quotes on:  |  Agriculture (62)  |  Chemist (79)  |  Fact (609)  |  Horse (40)  |  Intelligence (138)  |  Justus von Liebig (38)  |  Plough (8)  |  Virginia (2)

Much as I admired the elegance of physical theories, which at that time geology wholly lacked, I preferred a life in the woods to one in the laboratory.
From J. Tuzo Wilson, 'Early Days in University Geophysics', Ann. Rev. Earth Planet Sci. (1982), 10, 4.
Science quotes on:  |  Admiration (34)  |  Elegance (20)  |  Geology (187)  |  Laboratory (120)  |  Lack (52)  |  Life (917)  |  Physics (301)  |  Prefer (18)  |  Time (439)  |  Woods (11)

Much of the geographical work of the past hundred years... has either explicitly or implicitly taken its inspiration from biology, and in particular Darwin. Many of the original Darwinians, such as Hooker, Wallace, Huxley, Bates, and Darwin himself, were actively concerned with geographical exploration, and it was largely facts of geographical distribution in a spatial setting which provided Darwin with the germ of his theory.
'Darwin's Impact on Geography', Annals of the Association of American Geographers (1966), 56, 683.
Science quotes on:  |  H. W. Bates (3)  |  Biology (150)  |  Charles Darwin (284)  |  Distribution (21)  |  Exploration (93)  |  Geography (25)  |  Germ (27)  |  Sir Joseph Dalton Hooker (12)  |  Thomas Henry Huxley (119)  |  Alfred Russel Wallace (28)

My Lord said that he who knew men only in this way [from history] was like one who had got the theory of anatomy perfectly, but who in practice would find himself very awkward and liable to mistakes. That he again who knew men by observation was like one who picked up anatomy by practice, but who like all empirics would for a long time be liable to gross errors.
Science quotes on:  |  Anatomy (59)  |  Empirical (15)  |  Error (230)  |  Mistake (107)  |  Observation (418)  |  Practice (67)  |  Scientific Method (155)

My theory of electrical forces is that they are called into play in insulating media by slight electric displacements, which put certain small portions of the medium into a state of distortion which, being resisted by the elasticity of the medium, produces an electromotive force ... I suppose the elasticity of the sphere to react on the electrical matter surrounding it, and press it downwards.
From the determination by Kohlrausch and Weber of the numerical relation between the statical and magnetic effects of electricity, I have determined the elasticity of the medium in air, and assuming that it is the same with the luminiferous ether I have determined the velocity of propagation of transverse vibrations.
The result is
193088 miles per second
(deduced from electrical & magnetic experiments).
Fizeau has determined the velocity of light
= 193118 miles per second
by direct experiment.
This coincidence is not merely numerical. I worked out the formulae in the country, before seeing Webers [sic] number, which is in millimetres, and I think we have now strong reason to believe, whether my theory is a fact or not, that the luminiferous and the electromagnetic medium are one.
Letter to Michael Faraday (19 Oct 1861). In P. M. Harman (ed.), The Scientific Letters and Papers of James Clerk Maxwell (1990), Vol. 1, 1846-1862, 684-6.
Science quotes on:  |  Calculation (67)  |  Electromagnetism (17)  |  Ether (24)  |  Experiment (543)  |  Formula (51)  |  Friedrich Wilhelm Georg Kohlrausch (2)  |  Light Wave (2)  |  Propagation (9)  |  Speed Of Light (11)  |  Vibration (13)

My view, the skeptical one, holds that we may be as far away from an understanding of elementary particles as Newton's successors were from quantum mechanics. Like them, we have two tremendous tasks ahead of us. One is to study and explore the mathematics of the existing theories. The existing quantum field-theories may or may not be correct, but they certainly conceal mathematical depths which will take the genius of an Euler or a Hamilton to plumb. Our second task is to press on with the exploration of the wide range of physical phenomena of which the existing theories take no account. This means pressing on with experiments in the fashionable area of particle physics. Outstanding among the areas of physics which have been left out of recent theories of elementary particles are gravitation and cosmology
In Scientific American (Sep 1958). As cited in '50, 100 & 150 years ago', Scientific American (Sep 2008), 299, No. 3, 14.
Science quotes on:  |  Account (45)  |  Certainly (18)  |  Concealing (2)  |  Correctness (11)  |  Cosmology (17)  |  Elementary (30)  |  Leonhard Euler (10)  |  Existing (9)  |  Experiment (543)  |  Exploration (93)  |  Fashionable (6)  |  Genius (186)  |  Gravitation (27)  |  Mathematics (587)  |  Sir Isaac Newton (258)  |  Particle (90)  |  Particle Physics (9)  |  Phenomena (8)  |  Physical (94)  |  Quantum Field Theory (2)  |  Quantum Mechanics (31)  |  Recent (23)  |  Skeptic (6)  |  Study (331)  |  Successor (6)  |  Task (68)  |  Tremendous (11)  |  Understanding (317)

Nature is disordered, powerful and chaotic, and through fear of the chaos we impose system on it. We abhor complexity, and seek to simplify things whenever we can by whatever means we have at hand. We need to have an overall explanation of what the universe is and how it functions. In order to achieve this overall view we develop explanatory theories which will give structure to natural phenomena: we classify nature into a coherent system which appears to do what we say it does.
In Day the Universe Changed (1985), 11.
Science quotes on:  |  Abhorrence (8)  |  Achievement (128)  |  Appearance (77)  |  Chaos (63)  |  Classification (79)  |  Coherence (8)  |  Complexity (80)  |  Development (228)  |  Disorder (19)  |  Explanation (161)  |  Fear (113)  |  Function (90)  |  Imposition (5)  |  Means (109)  |  Natural (128)  |  Nature (1029)  |  Need (211)  |  Order (167)  |  Overall (3)  |  Phenomena (8)  |  Powerful (51)  |  Research (517)  |  Seeking (30)  |  Simplification (12)  |  Structure (191)  |  System (141)  |  Universe (563)  |  View (115)  |  Whatever (9)  |  Whenever (8)

Nazis started the Science of Eugenics. It’s the theory that to them, justified the holocaust. The problem is the Science has been broadly accepted around the world, including the United States. We even went as far as to hire the Scientists that were working on it and brought them over here rather then charging them with war crimes. [Project Paperclip] I think it is a very dangerous Science that contains ideologies that are a grave danger to the entire world.
James Dye
…...
Science quotes on:  |  Accept (37)  |  Bring (53)  |  Charge (29)  |  Contain (37)  |  Crime (20)  |  Danger (62)  |  Dangerous (45)  |  Entire (29)  |  Eugenics (4)  |  Far (77)  |  Grave (20)  |  Hire (4)  |  Ideology (7)  |  Include (27)  |  Justify (19)  |  Nazi (7)  |  Problem (362)  |  Project (22)  |  Science (1699)  |  Scientist (447)  |  Start (68)  |  Think (205)  |  Usa (6)  |  War (144)  |  Work (457)  |  World (667)

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.
Attributed to Einstein. Quoted in Alice Calaprice, The Quotable Einstein (1996), 224.
Science quotes on:  |  Experiment (543)

No experimental result can ever kill a theory: any theory can be saved from counterinstances either by some auxiliary hypothesis or by a suitable reinterpretation of its terms.
'Falsification and the Methodology of Scientific Research Programmes', in I. Lakatos and A. Musgrave (eds.), Criticism and the Growth of Knowledge: Proceedings of the International Colloquium in the Philosophy of Science, London 1965 (1970), Vol. 4, 116.
Science quotes on:  |  Experiment (543)  |  Hypothesis (227)  |  Result (250)

No generalizing beyond the data, no theory. No theory, no insight. And if no insight, why do research.
'Developing Theory About the Development of Theory,' in Ken G. Smith and Michael A. Hitt, Great Minds in Management: the Theory of Process Development (2005), 361.
Science quotes on:  |  Data (100)  |  Generalize (9)  |  Insight (57)  |  Research (517)

No matter how we twist and turn we shall always come back to the cell. The eternal merit of Schwann does not lie in his cell theory that has occupied the foreground for so long, and perhaps will soon be given up, but in his description of the development of the various tissues, and in his demonstration that this development (hence all physiological activity) is in the end traceable back to the cell. Now if pathology is nothing but physiology with obstacles, and diseased life nothing but healthy life interfered with by all manner of external and internal influences then pathology too must be referred back to the cell.
In 'Cellular-Pathologie', Archiv für pathologische Anatomie und Physiologie und fur klinische Medizin (1855), 8, 13-14, as translated in LellandJ. Rather, 'Cellular Pathology', Disease, Life, and Man: Selected Essays by Rudolf Virchow (1958), 81.
Science quotes on:  |  Activity (97)  |  Cell (125)  |  Demonstration (51)  |  Description (72)  |  Development (228)  |  Disease (257)  |  Eternal (43)  |  External (45)  |  Foreground (3)  |  Given (4)  |  Health (136)  |  Influence (110)  |  Interference (12)  |  Internal (18)  |  Life (917)  |  Merit (25)  |  Obstacle (21)  |  Occupied (2)  |  Pathology (11)  |  Physiological (6)  |  Physiology (66)  |  Theodor Schwann (12)  |  Tissue (24)  |  Trace (39)  |  Turn (72)  |  Twist (2)  |  Various (25)

No one has yet been found so firm of mind and purpose as resolutely to compel himself to sweep away all theories and common notions, and to apply the understanding, thus made fair and even, to a fresh examination of particulars. Thus it happens that human knowledge, as we have it, is a mere medley and ill-digested mass, made up of much credulity and much accident, and also of the childish notions which we at first imbibed.
Aphorism 20,' Novum Organum, Book II (1620)
Science quotes on:  |  Knowledge (1128)  |  Understanding (317)

No other theory known to science [other than superstring theory] uses such powerful mathematics at such a fundamental level. …because any unified field theory first must absorb the Riemannian geometry of Einstein’s theory and the Lie groups coming from quantum field theory… The new mathematics, which is responsible for the merger of these two theories, is topology, and it is responsible for accomplishing the seemingly impossible task of abolishing the infinities of a quantum theory of gravity.
In 'Conclusion', Hyperspace: A Scientific Odyssey Through Parallel Universes, Time Warps, and the Tenth Dimension (1995), 326.
Science quotes on:  |  Accomplishment (57)  |  Albert Einstein (535)  |  Field (119)  |  Fundamental (122)  |  Gravity (89)  |  Impossible (68)  |  Infinity (59)  |  Mathematics (587)  |  Powerful (51)  |  Quantum Theory (55)  |  Seem (89)  |  Superstring (3)  |  Task (68)  |  Unified (9)

No theory ever agrees with all the facts in its domain, yet it is not always the theory that is to blame. Facts are constituted by older ideologies, and a clash between facts and theories may be proof of progress. It is also a first step in our attempt to find the principles implicit in familiar observational notions.
Against Method: Outline of an Anarchistic Theory of Knowledge (1975, 1993), 39. This is his summary at the head of Chapter 5.
Science quotes on:  |  Fact (609)

No theory of physics that deals only with physics will ever explain physics. I believe that as we go on trying to understand the universe, we are at the same time trying to understand man.
In The Intellectual Digest (June 1973), as quoted and cited in Mark Chandos, 'Philosophical Essay: Story Theory", Kosmoautikon: Exodus From Sapiens (2015).
Science quotes on:  |  Explain (61)  |  Man (345)  |  Physics (301)  |  Understand (189)  |  Universe (563)

Nothing in our experience suggests the introduction of [complex numbers]. Indeed, if a mathematician is asked to justify his interest in complex numbers, he will point, with some indignation, to the many beautiful theorems in the theory of equations, of power series, and of analytic functions in general, which owe their origin to the introduction of complex numbers. The mathematician is not willing to give up his interest in these most beautiful accomplishments of his genius.
In 'The Unreasonable Effectiveness of Mathematics in the Natural Sciences,' Communications in Pure and Applied Mathematics (Feb 1960), 13, No. 1 (February 1960). Collected in Eugene Paul Wigner, A.S. Wightman (ed.), Jagdish Mehra (ed.), The Collected Works of Eugene Paul Wigner (1955), Vol. 6, 537.
Science quotes on:  |  Accomplishment (57)  |  Beautiful (81)  |  Complex Number (2)  |  Equation (69)  |  Experience (268)  |  Genius (186)  |  Indignation (2)  |  Interest (170)  |  Justify (19)  |  Mathematician (177)  |  Origin (77)  |  Owe (15)  |  Theorem (46)

Nothing in physics seems so hopeful to as the idea that it is possible for a theory to have a high degree of symmetry was hidden from us in everyday life. The physicist's task is to find this deeper symmetry.
In American Scientist (1977) (as cited in The Atlantic (1984), 254, 81.) As an epigraph in Crystal and Dragon: The Cosmic Dance of Symmetry and Chaos in Nature, Art and Consciousness (1993), 139.
Science quotes on:  |  Degree (48)  |  Everyday Life (4)  |  Hidden (34)  |  High (78)  |  Hope (129)  |  Idea (440)  |  Nothing (267)  |  Physics (301)  |  Possibility (96)  |  Seem (89)  |  Symmetry (26)

Now it came to me: … the independence of the gravitational acceleration from the nature of the falling substance, may be expressed as follows: In a gravitational field (of small spatial extension) things behave as they do in a space free of gravitation. … This happened in 1908. Why were another seven years required for the construction of the general theory of relativity? The main reason lies in the fact that it is not so easy to free oneself from the idea that coordinates must have an immediate metrical meaning.
In Paul Arthur Schilpp, 'Autobiographical Notes', Albert Einstein: Philosopher-Scientist (1949), 65-67.
Science quotes on:  |  Acceleration (6)  |  Construction (69)  |  Coordinate (2)  |  Fact (609)  |  Fall (89)  |  Field (119)  |  Free (59)  |  General (92)  |  Gravity (89)  |  Idea (440)  |  Immediate (27)  |  Independence (32)  |  Meaning (87)  |  Metrical (3)  |  Nature (1029)  |  Reason (330)  |  Relativity (50)  |  Year (214)

Now that we locate them [genes] in the chromosomes are we justified in regarding them as material units; as chemical bodies of a higher order than molecules? Frankly, these are questions with which the working geneticist has not much concern himself, except now and then to speculate as to the nature of the postulated elements. There is no consensus of opinion amongst geneticists as to what the genes are—whether they are real or purely fictitious—because at the level at which the genetic experiments lie, it does not make the slightest difference whether the gene is a hypothetical unit, or whether the gene is a material particle. In either case the unit is associated with a specific chromosome, and can be localized there by purely genetic analysis. Hence, if the gene is a material unit, it is a piece of chromosome; if it is a fictitious unit, it must be referred to a definite location in a chromosome—the same place as on the other hypothesis. Therefore, it makes no difference in the actual work in genetics which point of view is taken. Between the characters that are used by the geneticist and the genes that his theory postulates lies the whole field of embryonic development.
'The Relation of Genetics to Physiology and Medicine', Nobel Lecture (4 Jun 1934). In Nobel Lectures, Physiology or Medicine 1922-1941 (1965), 315.
Science quotes on:  |  Chromosome (17)  |  Consensus (5)  |  Embryo (22)  |  Experiment (543)  |  Gene (68)  |  Geneticist (11)  |  Hypothesis (227)  |  Molecule (125)  |  Opinion (146)  |  Postulate (23)  |  Speculation (77)

Now, in the development of our knowledge of the workings of Nature out of the tremendously complex assemblage of phenomena presented to the scientific inquirer, mathematics plays in some respects a very limited, in others a very important part. As regards the limitations, it is merely necessary to refer to the sciences connected with living matter, and to the ologies generally, to see that the facts and their connections are too indistinctly known to render mathematical analysis practicable, to say nothing of the complexity.
From article 'Electro-magnetic Theory II', in The Electrician (16 Jan 1891), 26, No. 661, 331.
Science quotes on:  |  Analysis (123)  |  Complexity (80)  |  Development (228)  |  Enquiry (75)  |  Fact (609)  |  Knowledge (1128)  |  Limitation (20)  |  Mathematics (587)  |  Nature (1029)  |  Phenomenon (218)

Observation is so wide awake, and facts are being so rapidly added to the sum of human experience, that it appears as if the theorizer would always be in arrears, and were doomed forever to arrive at imperfect conclusion; but the power to perceive a law is equally rare in all ages of the world, and depends but little on the number of facts observed.
A Week on the Concord and Merrimack Rivers (1921), 270.
Science quotes on:  |  Fact (609)  |  Law (418)  |  Observation (418)

Observations always involve theory.
…...
Science quotes on:  |  Involve (27)  |  Observation (418)

Of all regions of the earth none invites speculation more than that which lies beneath our feet, and in none is speculation more dangerous; yet, apart from speculation, it is little that we can say regarding the constitution of the interior of the earth. We know, with sufficient accuracy for most purposes, its size and shape: we know that its mean density is about 5½ times that of water, that the density must increase towards the centre, and that the temperature must be high, but beyond these facts little can be said to be known. Many theories of the earth have been propounded at different times: the central substance of the earth has been supposed to be fiery, fluid, solid, and gaseous in turn, till geologists have turned in despair from the subject, and become inclined to confine their attention to the outermost crust of the earth, leaving its centre as a playground for mathematicians.
'The Constitution of the Interior of the Earth, as Revealed by Earthquakes', Quarterly Journal of the Geological Society (1906), 62, 456.
Science quotes on:  |  Crust (17)  |  Earth (487)  |  Fact (609)  |  Interior (13)  |  Mathematics (587)  |  Playground (5)  |  Speculation (77)  |  Temperature (42)

On one occasion when [William] Smart found him engrossed with his fundamental theory, he asked Eddington how many people he thought would understand what he was writing—after a pause came the reply, 'Perhaps seven.'
A. V. Douglas, The Life of Arthur Stanley Eddington (1956), 110.
Science quotes on:  |  Publication (83)

On the whole, I cannot help saying that it appears to me not a little extraordinary, that a theory so new, and of such importance, overturning every thing that was thought to be the best established in chemistry, should rest on so very narrow and precarious a foundation, the experiments adduced in support of it being not only ambiguous or explicable on either hypothesis, but exceedingly few. I think I have recited them all, and that on which the greatest stress is laid, viz. That of the formation of water from the decomposition of the two kinds of air, has not been sufficiently repeated. Indeed it required so difficult and expensive an apparatus, and so many precautions in the use of it, that the frequent repetition of the experiment cannot be expected; and in these circumstances the practised experimenter cannot help suspecting the accuracy of the result and consequently the certainty of the conclusion.
Considerations on the Doctrine of Phlogiston (1796), 57-8.
Science quotes on:  |  Accuracy (52)  |  Air (151)  |  Ambiguity (9)  |  Apparatus (30)  |  Certainty (97)  |  Circumstance (48)  |  Conclusion (120)  |  Decomposition (12)  |  Difficulty (113)  |  Establish (30)  |  Experiment (543)  |  Explanation (161)  |  Extraordinary (32)  |  Formation (54)  |  Foundation (75)  |  Hypothesis (227)  |  Importance (183)  |  Narrow (33)  |  New (340)  |  Precarious (4)  |  Repeat (27)  |  Result (250)  |  Support (63)  |  Water (244)

Once the data are in, the theory has to follow along meekly.
Hardfought (1983). Quoted in Gary Westfahl, Science Fiction Quotations (2005), 322.
Science quotes on:  |  Data (100)

One day when the whole family had gone to a circus to see some extraordinary performing apes, I remained alone with my microscope, observing the life in the mobile cells of a transparent star-fish larva, when a new thought suddenly flashed across my brain. It struck me that similar cells might serve in the defence of the organism against intruders. Feeling that there was in this something of surpassing interest, I felt so excited that I began striding up and down the room and even went to the seashore in order to collect my thoughts.
I said to myself that, if my supposition was true, a splinter introduced into the body of a star-fish larva, devoid of blood-vessels or of a nervous system, should soon be surrounded by mobile cells as is to be observed in a man who runs a splinter into his finger. This was no sooner said than done.
There was a small garden to our dwelling, in which we had a few days previously organised a 'Christmas tree' for the children on a little tangerine tree; I fetched from it a few rose thorns and introduced them at once under the skin of some beautiful star-fish larvae as transparent as water.
I was too excited to sleep that night in the expectation of the result of my experiment, and very early the next morning I ascertained that it had fully succeeded.
That experiment formed the basis of the phagocyte theory, to the development of which I devoted the next twenty-five years of my life.
In Olga Metchnikoff, Life of Elie Metchnikoff 1845-1916 (1921), 116-7.
Science quotes on:  |  Cell (125)  |  Circus (3)  |  Experiment (543)  |  Introduce (27)  |  Larva (4)  |  Life (917)  |  Microscope (68)  |  Nerve (66)  |  Phagocyte (2)

Our most successful theories in physics are those that explicitly leave room for the unknown, while confining this room sufficiently to make the theory empirically disprovable. It does not matter whether this room is created by allowing for arbitrary forces as Newtonian dynamics does, or by allowing for arbitrary equations of state for matter, as General Relativity does, or for arbitrary motions of charges and dipoles, as Maxwell's electrodynamics does. To exclude the unknown wholly as a “unified field theory” or a “world equation” purports to do is pointless and of no scientific significance.
Science quotes on:  |  Physics (301)

Our natural way of thinking about these coarser emotions is that the mental perception of some fact excites the mental affection called the emotion, and that this latter state of mind gives rise to the bodily expression. My theory, on the contrary, is that the bodily changes follow directly the perception of the exciting fact, and that our feeling of the same changes as they occur IS the emotion. Common-sense says, we lose our fortune, are sorry and weep; we meet a bear, are frightened and run; we are insulted by a rival, are angry and strike. The hypothesis here to be defended says that this order of sequence is incorrect, that the one mental state is not immediately induced by the other, that the bodily manifestations must first be interposed between, and that the more rational statement is that we feel sorry because we cry, angry because we strike, afraid because we tremble, and not that we cry, strike, or tremble, because we are sorry, angry, or fearful, as the case may be. Without the bodily states following on the perception, the latter would be purely cognitive in form, pale, colorless, destitute of emotional warmth. We might then see the bear, and judge it best to run, receive the insult and deem it right to strike, but we should not actually feel afraid or angry.
The Principles or Psychology (1890), Vol. 2, 449-50.
Science quotes on:  |  Emotion (62)  |  Fact (609)  |  Feel Sorry (4)  |  Hypothesis (227)  |  Mind (544)  |  Perception (53)  |  Thinking (222)

Owing to his lack of knowledge, the ordinary man cannot attempt to resolve conflicting theories of conflicting advice into a single organized structure. He is likely to assume the information available to him is on the order of what we might think of as a few pieces of an enormous jigsaw puzzle. If a given piece fails to fit, it is not because it is fraudulent; more likely the contradictions and inconsistencies within his information are due to his lack of understanding and to the fact that he possesses only a few pieces of the puzzle. Differing statements about the nature of things, differing medical philosophies, different diagnoses and treatments—all of these are to be collected eagerly and be made a part of the individual's collection of puzzle pieces. Ultimately, after many lifetimes, the pieces will fit together and the individual will attain clear and certain knowledge.
'Strategies of Resort to Curers in South India', contributed in Charles M. Leslie (ed.), Asian Medical Systems: A Comparative Study (1976), 185.
Science quotes on:  |  Advice (33)  |  Assumption (49)  |  Attempt (94)  |  Availability (10)  |  Certainty (97)  |  Clarity (31)  |  Collection (38)  |  Conflict (49)  |  Contradiction (44)  |  Diagnosis (61)  |  Difference (208)  |  Eagerness (4)  |  Fact (609)  |  Failure (118)  |  Few (9)  |  Fit (31)  |  Inconsistency (4)  |  Individual (177)  |  Information (102)  |  Jigsaw (2)  |  Knowledge (1128)  |  Lack (52)  |  Lifetime (19)  |  Man (345)  |  Medicine (322)  |  Nature Of Things (5)  |  Ordinary (44)  |  Organization (79)  |  Philosophy (213)  |  Piece (32)  |  Possession (37)  |  Puzzle (30)  |  Resolution (16)  |  Single (72)  |  Statement (56)  |  Structure (191)  |  Thinking (222)  |  Treatment (88)  |  Ultimate (61)

Parkinson's Law is a purely scientific discovery, inapplicable except in theory to the politics of the day. It is not the business of the botanist to eradicate the weeds. Enough for him if he can tell us just how fast they grow.
Parkinson's Law or the Pursuit of Progress (1958), 15.
Science quotes on:  |  Botanist (16)  |  Business (71)  |  Discovery (591)  |  Enough (6)  |  Eradication (2)  |  Growth (111)  |  Law (418)  |  Parkinson’s Law (4)  |  Research (517)  |  Sufficiency (13)  |  Tell (67)  |  Weed (14)

Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise. Without them your theories are vain surmises. But while you are studying, observing, experimenting, do not remain content with the surface of things. Do not become a mere recorder of facts, but try to penetrate the mystery of their origin. Seek obstinately for the laws that govern them.
Translation of a note, 'Bequest of Pavlov to the Academic Youth of his Country', written a few days before his death for a student magazine, The Generation of the Victors. As published in 'Pavlov and the Spirit of Science', Nature (4 Apr 1936), 137, 572.
Science quotes on:  |  Content (39)  |  Experiment (543)  |  Fact (609)  |  Law (418)  |  Mere (41)  |  Mystery (125)  |  Observe (48)  |  Obstinately (2)  |  Origin (77)  |  Penetrate (21)  |  Recorder (3)  |  Remain (77)  |  Science (1699)  |  Seek (57)  |  Study (331)  |  Surface (74)  |  Surmise (2)  |  Vain (26)

Philosophers of science constantly discuss theories and representation of reality, but say almost nothing about experiment, technology, or the use of knowledge to alter the world. This is odd, because ‘experimental method’ used to be just another name for scientific method.... I hope [to] initiate a Back-to-Bacon movement, in which we attend more seriously to experimental science. Experimentation has a life of its own.
Representing and Intervening, p. 149f (1983). Announcing the author's intention to stress 'intervening' as an essential component of science.
Science quotes on:  |  Alter (19)  |  Attend (9)  |  Constantly (19)  |  Discuss (14)  |  Experiment (543)  |  Experimental (12)  |  Experimentation (6)  |  Hope (129)  |  Initiate (4)  |  Knowledge (1128)  |  Life (917)  |  Method (154)  |  Movement (65)  |  Name (118)  |  Nothing (267)  |  Odd (12)  |  Philosopher (132)  |  Reality (140)  |  Representation (27)  |  Say (126)  |  Science (1699)  |  Scientific Method (155)  |  Seriously (13)  |  Technology (199)  |  World (667)

Positivism is a theory of knowledge according to which the only kind of sound knowledge available to human kind is that if science grounded in observation.
(1891). As given as an epigraph in M.J. Vinod and Meena Deshpande, Contemporary Political Theory (2013), 3.
Science quotes on:  |  Kind (99)  |  Knowledge (1128)  |  Observation (418)  |  Science (1699)  |  Sound (59)

Professor Bethe … is a man who has this characteristic: If there’s a good experimental number you’ve got to figure it out from theory. So, he forced the quantum electrodynamics of the day to give him an answer [for the experimentally measured Lamb-shift of hydrogen], … and thus, made the most important discovery in the history of the theory of quantum electrodynamics. He worked this out on the train from Ithaca, New York to Schenectady.
Bethe calculated, what Lamb had experimentally just measured, for the separation of the 2S½ and 2P½ of hydrogen. Both theory and measurement yielded about one thousand megacycles for the Lamb-shift. Feynman was at the time associated with Bethe at Cornell. In Feynman’s Nobel Prize Lecture (11 Dec 1965), 'The Development of the Space-Time View of Quantum Electrodynamics'. Collected in Stig Lundqvist, Nobel Lectures: Physics, 1963-1970 (1998), 170.
Science quotes on:  |  Answer (201)  |  Hans Albrecht Bethe (5)  |  Calculate (15)  |  Characteristic (66)  |  Discovery (591)  |  Experiment (543)  |  History (302)  |  Hydrogen (37)  |  Quantum Electrodynamics (3)

Professor, how can you bring yourself to enter this chemical building that has Ionic columns?
[Kahlenberg, a physical chemist, was an opponent of ionic theory.]
Quoted in Ralph Oesper, The Human Side of Scientists (1975), 106.
Science quotes on:  |  Joke (39)

Professors in every branch of the sciences, prefer their own theories to truth: the reason is that their theories are private property, but truth is common stock.
Reflection 378, in Lacon: or Many things in Few Words; Addressed to Those Who Think (1820), Vol. 1, 169.
Science quotes on:  |  Truth (750)

Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on a larger number of facts. … Theories are only hypotheses, verified by more or less numerous facts. Those verified by the most facts are the best, but even then they are never final, never to be absolutely believed.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 165.
Science quotes on:  |  Absolute (65)  |  Achievement (128)  |  Belief (400)  |  Best (129)  |  Fact (609)  |  Final (33)  |  Hypothesis (227)  |  Larger (8)  |  Less (54)  |  New (340)  |  Numerous (21)  |  Progress (317)  |  Verification (20)

Propose theories which can be criticized. Think about possible decisive falsifying experiments—crucial experiments. But do not give up your theories too easily—not, at any rate, before you have critically examined your criticism.
'The Problem of Demarcation' (1974). Collected in David Miller (ed.) Popper Selections (1985), 126-127.
Science quotes on:  |  Criticism (52)  |  Decisive (9)  |  Ease (29)  |  Examination (60)  |  Experiment (543)  |  Falsification (7)  |  Proposition (47)  |  Thinking (222)

Psychoanalytic theory is the most stupendous intellectual confidence trick of the twentieth century and a terminal product as well—something akin to a dinosaur or zeppelin in the history of ideas, a vast structure of radically unsound design and with no posterity.
'Victims of Psychiatry', The New York Review of Books (23 Jan 1975), 21. Cited in David E. Stannard, Shrinking History: On Freud and the Failure of Psychohistory (1980), 150.
Science quotes on:  |  20th Century (25)  |  Design (92)  |  Dinosaur (23)  |  History (302)  |  Idea (440)  |  Intellect (157)  |  Posterity (16)  |  Product (72)  |  Psychoanalysis (37)  |  Radical (17)  |  Structure (191)  |  Stupendous (5)  |  Terminal (2)  |  Unsound (3)  |  Zeppelin (4)

Psychology appeared to be a jungle of confusing, conflicting, and arbitrary concepts. These pre-scientific theories doubtless contained insights which still surpass in refinement those depended upon by psychiatrists or psychologists today. But who knows, among the many brilliant ideas offered, which are the true ones? Some will claim that the statements of one theorist are correct, but others will favour the views of another. Then there is no objective way of sorting out the truth except through scientific research.
From The Scientific Analysis of Personality (1965), 14.
Science quotes on:  |  Arbitrary (16)  |  Brilliant (14)  |  Claim (52)  |  Concept (102)  |  Conflicting (3)  |  Confusing (2)  |  Correct (53)  |  Idea (440)  |  Insight (57)  |  Jungle (13)  |  Psychiatrist (13)  |  Psychologist (11)  |  Psychology (125)  |  Refinement (12)  |  Research (517)  |  Statement (56)  |  Surpass (12)  |  Theorist (24)  |  True (120)  |  Truth (750)

Psychotherapy–the theory that the patient will probably get well anyhow.
…...
Science quotes on:  |  Patient (116)  |  Probably (21)  |  Psychotherapy (2)

Pure mathematics is much more than an armoury of tools and techniques for the applied mathematician. On the other hand, the pure mathematician has ever been grateful to applied mathematics for stimulus and inspiration. From the vibrations of the violin string they have drawn enchanting harmonies of Fourier Series, and to study the triode valve they have invented a whole theory of non-linear oscillations.
In 100 Years of Mathematics: a Personal Viewpoint (1981), 3.
Science quotes on:  |  Applied Mathematics (10)  |  Grateful (3)  |  Hand (103)  |  Harmony (55)  |  Inspiration (50)  |  Invent (30)  |  Oscillation (6)  |  Pure Mathematics (27)  |  Stimulus (18)  |  String (17)  |  Study (331)  |  Technique (41)  |  Tool (70)  |  Valve (2)  |  Vibration (13)  |  Violin (2)

Quantum mechanics and relativity, taken together, are extraordinarily restrictive, and they therefore provide us with a great logical machine. We can explore with our minds any number of possible universes consisting of all kinds of mythical particles and interactions, but all except a very few can be rejected on a priori grounds because they are not simultaneously consistent with special relativity and quantum mechanics. Hopefully in the end we will find that only one theory is consistent with both and that theory will determine the nature of our particular universe.
…...
Science quotes on:  |  A Priori (16)  |  Both (52)  |  Consist (22)  |  Consistent (10)  |  Determine (45)  |  End (141)  |  Exploration (93)  |  Find (248)  |  Great (300)  |  Ground (63)  |  Interaction (28)  |  Kind (99)  |  Logical (20)  |  Machine (133)  |  Mind (544)  |  Mythical (3)  |  Nature (1029)  |  Number (179)  |  Particle (90)  |  Particular (54)  |  Possible (100)  |  Provide (48)  |  Quantum Mechanics (31)  |  Reject (21)  |  Relativity (50)  |  Restrictive (4)  |  Simultaneous (12)  |  Special Relativity (3)  |  Together (48)  |  Universe (563)

Quite recently the human descent theory has been stigmatized as the “gorilla theory of human ancestry.” All this despite the fact that Darwin himself, in the days when not a single bit of evidence regarding the fossil ancestors of man was recognized, distinctly stated that none of the known anthropoid apes, much less any of the known monkeys, should be considered in any way as ancestral to the human stock.
In Henry Fairfield Osborn, 'Osborn States the Case For Evolution', New York Times (12 Jul 1925), XX1. Written at the time of the Scopes Monkey Trial, in rebuttal of the anti-evolution position publicized by William Jennings Bryan.
Science quotes on:  |  Ancestry (4)  |  Anthropoid (4)  |  Ape (39)  |  Charles Darwin (284)  |  Descent Of Man (5)  |  Evidence (157)  |  Evolution (482)  |  Fact (609)  |  Fossil (107)  |  Gorilla (16)  |  Human (445)  |  Monkey (37)  |  Recognition (62)

Reality is what kicks back when you kick it. This is just what physicists do with their particle accelerators. We kick reality and feel it kick back. From the intensity and duration of thousands of those kicks over many years, we have formed a coherent theory of matter and forces, called the standard model, that currently agrees with all observations.
In Has Science Found God?: The Latest Results in the Search for Purpose in the Universe (2003), 41.
Science quotes on:  |  Accelerator (7)  |  Agreement (29)  |  Coherence (8)  |  Duration (9)  |  Feel (93)  |  Force (194)  |  Intensity (19)  |  Kick (7)  |  Matter (270)  |  Observation (418)  |  Reality (140)  |  Standard Model (2)

Relativity was a highly technical new theory that gave new meanings to familiar concepts and even to the nature of the theory itself. The general public looked upon relativity as indicative of the seemingly incomprehensible modern era, educated scientists despaired of ever understanding what Einstein had done, and political ideologues used the new theory to exploit public fears and anxieties—all of which opened a rift between science and the broader culture that continues to expand today.
'The Cultural Legacy of Relativity Theory' in Albert Einstein, Robert W. Lawson, Robert Geroch, Roger Penrose and David C. Cassidy, Relativity (2005), 226.
Science quotes on:  |  Exploit (10)  |  Fear (113)  |  Relativity (50)  |  Understanding (317)

Religious creeds are a great obstacle to any full sympathy between the outlook of the scientist and the outlook which religion is so often supposed to require … The spirit of seeking which animates us refuses to regard any kind of creed as its goal. It would be a shock to come across a university where it was the practice of the students to recite adherence to Newton's laws of motion, to Maxwell's equations and to the electromagnetic theory of light. We should not deplore it the less if our own pet theory happened to be included, or if the list were brought up to date every few years. We should say that the students cannot possibly realise the intention of scientific training if they are taught to look on these results as things to be recited and subscribed to. Science may fall short of its ideal, and although the peril scarcely takes this extreme form, it is not always easy, particularly in popular science, to maintain our stand against creed and dogma.
Swarthmore Lecture (1929), Science and the Unseen World (1929), 54-56.
Science quotes on:  |  Education (280)  |  Enquiry (75)  |  James Clerk Maxwell (75)  |  Sir Isaac Newton (258)  |  Religion (210)  |  Science (1699)

Samuel Pierpoint Langley, … one of the most distinguished scientists in the United States … evidently believed that a full sized airplane could be built and flown largely from theory alone. This resulted in two successive disastrous plunges into the Potomac River, the second of which almost drowned his pilot. This experience contrasts with that of two bicycle mechanics Orville and Wilbur Wright who designed, built and flew the first successful airplane. But they did this after hundreds of experiments extending over a number of years.
In article Total Quality: Its Origins and its Future (1995), published at the Center for Quality and Productivity Improvement.
Science quotes on:  |  Airplane (32)  |  Alone (61)  |  Bicycle (8)  |  Build (80)  |  Contrast (16)  |  Design (92)  |  Disastrous (3)  |  Distinguished (6)  |  Drown (9)  |  Experience (268)  |  Experiment (543)  |  Fly (65)  |  Samuel Pierpont Langley (3)  |  Largely (12)  |  Mechanic (13)  |  Pilot (10)  |  Plunge (7)  |  Regarded (2)  |  Result (250)  |  Scientist (447)  |  Success (202)  |  United States (31)  |  Orville Wright (6)

Scarcely any attempt is entirely a failure; scarcely any theory, the result of steady thought, is altogether false; no tempting form of Error is without some latent charm derived from Truth.
In 'Lecture 7', Lectures on the History of Moral Philosophy in England (1852), 101.
Science quotes on:  |  Altogether (6)  |  Attempt (94)  |  Charm (18)  |  Derive (18)  |  Error (230)  |  Failure (118)  |  False (79)  |  Form (210)  |  Latent (9)  |  Result (250)  |  Steady (12)  |  Tempt (4)  |  Thought (374)  |  Truth (750)

Scarcely anyone who comprehends this theory can escape its magic.
Quoted, without citation, in Norman K. Glendenning, Our Place in the Universe (2007), 107. Webmaster has not found any other source for this quote, and cautions doubt about its authenticity. If you know a primary source, please contact Webmaster.
Science quotes on:  |  Anyone (26)  |  Comprehension (51)  |  Escape (34)  |  Magic (67)  |  Scarcely (6)

Schrodinger’s wave-mechanics is not a physical theory but a dodge—and a very good dodge too.
Gifford Lectures (1927), The Nature of the Physical World (1928), 219.
Science quotes on:  |  Quantum Mechanics (31)  |  Erwin Schrödinger (65)

Science asks no questions about the ontological pedigree or a priori character of a theory, but is content to judge it by its performance; and it is thus that a knowledge of nature, having all the certainty which the senses are competent to inspire, has been attained—a knowledge which maintains a strict neutrality toward all philosophical systems and concerns itself not with the genesis or a priori grounds of ideas.
Originally published in North American Review (1865). 'The Philosophy of Herbert Spencer,' repr. In Philosophical Writings of Chauncey Wright (1963), p. 8.
Science quotes on:  |  A Priori (16)  |  Ask (99)  |  Attain (21)  |  Certainty (97)  |  Character (82)  |  Competent (10)  |  Concern (76)  |  Content (39)  |  Genesis (13)  |  Ground (63)  |  Idea (440)  |  Inspire (35)  |  Judge (43)  |  Knowledge (1128)  |  Maintain (22)  |  Nature (1029)  |  Neutrality (3)  |  Pedigree (3)  |  Performance (27)  |  Philosophical (14)  |  Question (315)  |  Science (1699)  |  Sense (240)  |  Strict (7)  |  System (141)  |  Toward (29)

Science deals with judgments on which it is possible to obtain universal agreement. These judgments do not concern individual facts and events, but the invariable association of facts and events known as the laws of science. Agreement is secured by observation and experiment—impartial courts of appeal to which all men must submit if they wish to survive. The laws are grouped and explained by theories of ever increasing generality. The theories at first are ex post facto—merely plausible interpretations of existing bodies of data. However, they frequently lead to predictions that can be tested by experiments and observations in new fields, and, if the interpretations are verified, the theories are accepted as working hypotheses until they prove untenable. The essential requirements are agreement on the subject matter and the verification of predictions. These features insure a body of positive knowledge that can be transmitted from person to person, and that accumulates from generation to generation.
From manuscript on English Science in the Renaissance (1937), Edwin Hubble collection, Box 2, Huntington Library, San Marino, California. As cited by Norriss S. Hetherington in 'Philosophical Values and Observation in Edwin Hubble's Choice of a Model of the Universe', Historical Studies in the Physical Sciences (1982), 13, No. 1, 41. (Hetherington comments parenthetically that the references to court, judgment and appeal may be attributable to his prior experiences as a Rhodes Scholar reading Roman law at Oxford, and to a year's practice as an attorney in Louisville, Kentucky.)
Science quotes on:  |  Accumulation (29)  |  Agreement (29)  |  Appeal (30)  |  Association (15)  |  Court (16)  |  Data (100)  |  Event (97)  |  Experiment (543)  |  Fact (609)  |  Generality (22)  |  Generation (111)  |  Impartiality (3)  |  Interpretation (61)  |  Judgment (72)  |  Knowledge (1128)  |  Obervation (3)  |  Plausibility (6)  |  Prediction (67)  |  Science (1699)  |  Scientific Method (155)  |  Survival (49)  |  Test (96)  |  Transmission (23)  |  Verification (20)

Science derives its conclusions by the laws of logic from our sense perceptions, Thus it does not deal with the real world, of which we know nothing, but with the world as it appears to our senses. … All our sense perceptions are limited by and attached to the conceptions of time and space. … Modern physics has come to the same conclusion in the relativity theory, that absolute space and absolute time have no existence, but, time and space exist only as far as things or events fill them, that is, are forms of sense perception.
In 'Religion and Modern Science', The Christian Register (16 Nov 1922), 101, 1089. The article is introduced as “the substance of an address to the Laymen’s League in All Soul’s Church (5 Nov 1922).
Science quotes on:  |  Absolute (65)  |  Conclusion (120)  |  Event (97)  |  Existence (254)  |  Know (321)  |  Law (418)  |  Logic (187)  |  Modern Physics (12)  |  Nothing (267)  |  Perception (53)  |  Real World (8)  |  Relativity (50)  |  Science (1699)  |  Sense (240)  |  Time And Space (30)

Science has hitherto been proceeding without the guidance of any rational theory of logic, and has certainly made good progress. It is like a computer who is pursuing some method of arithmetical approximation. Even if he occasionally makes mistakes in his ciphering, yet if the process is a good one they will rectify themselves. But then he would approximate much more rapidly if he did not commit these errors; and in my opinion, the time has come when science ought to be provided with a logic. My theory satisfies me; I can see no flaw in it. According to that theory universality, necessity, exactitude, in the absolute sense of these words, are unattainable by us, and do not exist in nature. There is an ideal law to which nature approximates; but to express it would require an endless series of modifications, like the decimals expressing surd. Only when you have asked a question in so crude a shape that continuity is not involved, is a perfectly true answer attainable.
Letter to G. F. Becker, 11 June 1893. Merrill Collection, Library of Congress. Quoted in Nathan Reingold, Science in Nineteenth-Century America: A Documentary History (1966), 231-2.
Science quotes on:  |  Absolute (65)  |  Answer (201)  |  Approximation (16)  |  Arithmetic (68)  |  Attainment (35)  |  Commitment (11)  |  Computer (84)  |  Crudity (3)  |  Decimal (11)  |  Endless (20)  |  Error (230)  |  Exactitude (6)  |  Existence (254)  |  Flaw (8)  |  Good (228)  |  Guidance (12)  |  Hitherto (3)  |  Ideal (52)  |  Logic (187)  |  Method (154)  |  Modification (31)  |  Nature (1029)  |  Necessity (125)  |  Opinion (146)  |  Perfection (71)  |  Proceeding (13)  |  Progress (317)  |  Provision (15)  |  Pursuit (55)  |  Question (315)  |  Rapidity (14)  |  Rationality (11)  |  Satisfaction (48)  |  Science (1699)  |  Sense (240)  |  Series (38)  |  Time (439)  |  Truth (750)  |  Universality (11)  |  Word (221)

Science has so accustomed us to devising and accepting theories to account for the facts we observe, however fantastic, that our minds must begin their manufacture before we are aware of it.
Seven American Nights (1978). In the collection, David G. Hartwell (Ed.), The Dark Descent (1997), 653.

Science in England, in America, is jealous of theory, hates the name of love and moral purpose. There's revenge for this humanity. What manner of man does science make? The boy is not attracted. He says, I do not wish to be such a kind of man as my professor is.
In essay. 'Beauty', collected in The Conduct of Life (1860), 250.
Science quotes on:  |  America (74)  |  Attract (15)  |  Boy (33)  |  England (31)  |  Hate (26)  |  Humanity (104)  |  Jealous (3)  |  Kind (99)  |  Love (164)  |  Manner (35)  |  Moral (100)  |  Name (118)  |  Professor (39)  |  Purpose (138)  |  Revenge (6)  |  Say (126)  |  Science (1699)  |  Wish (62)

Science is always discovering odd scraps of magical wisdom and making a tremendous fuss about its cleverness.
Referring to Freudian theories.
The Confessions of Aleister Crowley, ch. 14 (1929, rev 1970).
Science quotes on:  |  Cleverness (9)  |  Discover (115)  |  Freudian (4)  |  Fuss (2)  |  Magic (67)  |  Odd (12)  |  Refer (5)  |  Science (1699)  |  Scrap (2)  |  Tremendous (11)  |  Wisdom (151)

Science is an essentially anarchic enterprise: theoretical anarchism is more humanitarian and more likely to encourage progress than its law-and-order alternatives.
From Against Method: Outline of an Anarchistic Theory of Knowledge (1975, 1993), 9.
Science quotes on:  |  Progress (317)  |  Science (1699)

Science is in a literal sense constructive of new facts. It has no fixed body of facts passively awaiting explanation, for successful theories allow the construction of new instruments—electron microscopes and deep space probes—and the exploration of phenomena that were beyond description—the behavior of transistors, recombinant DNA, and elementary particles, for example. This is a key point in the progressive nature of science—not only are there more elegant or accurate analyses of phenomena already known, but there is also extension of the range of phenomena that exist to be described and explained.
Co-author with Michael A. Arbib, English-born professor of computer science and biomedical engineering (1940-)
Michael A. Arbib and Mary B. Hesse, The Construction of Reality (1986), 8.
Science quotes on:  |  Fact (609)  |  Observation (418)

Science is not about control. It is about cultivating a perpetual sense of wonder in the face of something that forever grows one step richer and subtler than our latest theory about it. It is about reverence, not mastery.
…...
Science quotes on:  |  Control (93)  |  Cultivate (9)  |  Face (69)  |  Forever (42)  |  Grow (66)  |  Late (28)  |  Mastery (20)  |  Perpetual (10)  |  Reverence (24)  |  Rich (48)  |  Science (1699)  |  Sense (240)  |  Step (67)  |  Wonder (134)

Science is uncertain. Theories are subject to revision; observations are open to a variety of interpretations, and scientists quarrel amongst themselves. This is disillusioning for those untrained in the scientific method, who thus turn to the rigid certainty of the Bible instead. There is something comfortable about a view that allows for no deviation and that spares you the painful necessity of having to think.
The 'Threat' of Creationism. In Ashley Montagu (ed.), Science and Creationism (1984), 192.
Science quotes on:  |  Bible (83)  |  Comfort (42)  |  Creationist (15)  |  Deviation (11)  |  Quarrel (9)  |  Religion (210)  |  Revision (4)  |  Science (1699)  |  Scientific Method (155)  |  Thinking (222)  |  Uncertainty (37)

Science’s biggest mystery is the nature of consciousness. It is not that we possess bad or imperfect theories of human awareness; we simply have no such theories at all.
In Quantum Reality: Beyond the New Physics (1987), 249.
Science quotes on:  |  Awareness (23)  |  Bad (78)  |  Consciousness (71)  |  Human (445)  |  Imperfect (10)  |  Mystery (125)  |  Nature (1029)  |  Possession (37)  |  Science (1699)

Scientific discovery, or the formulation of scientific theory, starts in with the unvarnished and unembroidered evidence of the senses. It starts with simple observation—simple, unbiased, unprejudiced, naive, or innocent observation—and out of this sensory evidence, embodied in the form of simple propositions or declarations of fact, generalizations will grow up and take shape, almost as if some process of crystallization or condensation were taking place. Out of a disorderly array of facts, an orderly theory, an orderly general statement, will somehow emerge.
In 'Is the Scientific Paper Fraudulent?', The Saturday Review (1 Aug 1964), 42.
Science quotes on:  |  Array (5)  |  Condensation (8)  |  Crystallization (2)  |  Declaration (5)  |  Discovery (591)  |  Embody (13)  |  Emerge (16)  |  Evidence (157)  |  Fact (609)  |  Form (210)  |  Formulation (20)  |  General (92)  |  Generalization (26)  |  Grow (66)  |  Innocent (8)  |  Naive (8)  |  Observation (418)  |  Order (167)  |  Process (201)  |  Proposition (47)  |  Scientific (169)  |  Sense (240)  |  Shape (52)  |  Simple (111)  |  Somehow (3)  |  Start (68)  |  Statement (56)  |  Unbiased (4)  |  Unprejudiced (2)  |  Unvarnished (2)

Scientific theories need reconstruction every now and then. If they didn't need reconstruction they would be facts, not theories. The more facts we know, the less radical become the changes in our theories. Hence they are becoming more and more constant. But take the theory of gravitation; it has not been changed in four hundred years.
As quoted in 'Electricity Will Keep The World From Freezing Up', New York Times (12 Nov 1911), SM4.
Science quotes on:  |  Change (291)  |  Constant (40)  |  Fact (609)  |  Reconstruction (13)  |  Theory Of Gravitation (6)

Scientific theories tell us what is possible; myths tell us what is desirable. Both are needed to guide proper action.
…...
Science quotes on:  |  Action (151)  |  Both (52)  |  Desirable (5)  |  Guide (46)  |  Myth (43)  |  Need (211)  |  Possible (100)  |  Proper (27)  |  Scientific (169)  |  Tell (67)

Scientists are not robotic inducing machines that infer structures of explanation only from regularities observed in natural phenomena (assuming, as I doubt, that such a style of reasoning could ever achieve success in principle). Scientists are human beings, immersed in culture, and struggling with all the curious tools of inference that mind permits ... Culture can potentiate as well as constrain–as Darwin’s translation of Adam Smith’s laissez-faire economic models into biology as the theory of natural selection. In any case, objective minds do not exist outside culture, so we must make the best of our ineluctable embedding.
…...
Science quotes on:  |  Achieve (36)  |  Assume (19)  |  Best (129)  |  Biology (150)  |  Case (64)  |  Constrain (6)  |  Culture (85)  |  Curious (24)  |  Darwins (5)  |  Doubt (121)  |  Economic (21)  |  Embed (5)  |  Exist (89)  |  Explanation (161)  |  Human Beings (19)  |  Induce (6)  |  Infer (10)  |  Inference (26)  |  Machine (133)  |  Mind (544)  |  Model (64)  |  Natural (128)  |  Natural Selection (79)  |  Objective (49)  |  Observe (48)  |  Outside (37)  |  Permit (20)  |  Phenomenon (218)  |  Potentiate (2)  |  Principle (228)  |  Reason (330)  |  Regularity (24)  |  Scientist (447)  |  Structure (191)  |  Struggle (60)  |  Style (15)  |  Success (202)  |  Tool (70)  |  Translation (12)

Scientists aren’t one tenth, nor one hundredth of one percent as silly as the asinine theory-hawking befuddlists who attack them.
Letter from London (20 Apr 1937), No. 81, in George Gaylord Simpson and Léo F. LaPorte (ed.), Simple Curiosity: Letters from George Gaylord Simpson to His Family, 1921-1970 (1987), 34.
Science quotes on:  |  Attack (29)  |  Scientist (447)  |  Silly (10)

Scientists can only carry on with their work, addressing legitimate questions as they arise and challenging misinformation. … Scientists work to fill the gaps in human knowledge and to build a theory that can explain observations of the world. Climate sceptics revel in such gaps, sometimes long after they have been filled.
Editorial, Nature (28 Jul 2011), 475, 423-424.
Science quotes on:  |  Building (51)  |  Challenging (3)  |  Climate (38)  |  Climate Change (56)  |  Explanation (161)  |  Filling (6)  |  Gap (20)  |  Global Warming (26)  |  Human (445)  |  Knowledge (1128)  |  Legitimate (8)  |  Misinformation (3)  |  Observation (418)  |  Question (315)  |  Research (517)  |  Revel (4)  |  Scientist (447)  |  Skeptic (6)  |  Work (457)  |  World (667)

Scientists have odious manners, except when you prop up their theory; then you can borrow money off them.
The Bee (c.1902). In What is Man? And Other Essays (1917), 283. Reprinted in Charles Neider (ed.), Complete Essays (1963). In Mark Twain and Brian Collins (ed.), When in Doubt, Tell the Truth: and Other Quotations from Mark Twain (1996), 118.
Science quotes on:  |  Borrow (12)  |  Manners (3)  |  Money (125)  |  Odious (2)  |  Prop (6)  |  Scientist (447)

Scientists repeatedly return to established theories to test them in new ways, and tend towards testiness with those priests, religious or secular, who know the answers already—whatever the questions are.
In Terry Pratchett, Ian Stewart and Jack Cohen, The Science of Discworld (2014), 90.
Science quotes on:  |  Answer (201)  |  Know (321)  |  Priest (16)  |  Question (315)  |  Religious (44)  |  Scientist (447)  |  Secular (8)  |  Test (96)

Scientists, therefore, are responsible for their research, not only intellectually but also morally. This responsibility has become an important issue in many of today's sciences, but especially so in physics, in which the results of quantum mechanics and relativity theory have opened up two very different paths for physicists to pursue. They may lead us—to put it in extreme terms—to the Buddha or to the Bomb, and it is up to each of us to decide which path to take.
In The Turning Point: Science, Society, and the Rising Culture (1983), 87.
Science quotes on:  |  Atomic Bomb (101)  |  Buddha_Gautama (2)  |  Decision (58)  |  Difference (208)  |  Especially (18)  |  Extreme (36)  |  Importance (183)  |  Intellect (157)  |  Issue (37)  |  Moral (100)  |  Path (59)  |  Physics (301)  |  Pursuit (55)  |  Quantum Theory (55)  |  Relativity (50)  |  Research (517)  |  Responsibility (47)  |  Scientist (447)  |  Term (87)  |  Today (86)

Shortly after electrons were discovered it was thought that atoms were like little solar systems, made up of a … nucleus and electrons, which went around in “orbits,” much like the planets … around the sun. If you think that’s the way atoms are, then you’re back in 1910.
In QED: The Strange Theory of Light and Matter (1985, 2006), 84.
Science quotes on:  |  Atom (251)  |  Discovery (591)  |  Electron (66)  |  Nucleus (30)  |  Orbit (58)  |  Planet (199)  |  Solar System (48)  |  Sun (211)  |  Think (205)

Since religion intrinsically rejects empirical methods, there should never be any attempt to reconcile scientific theories with religion. [An infinitely old universe, always evolving may not be compatible with the Book of Genesis. However, religions such as Buddhism get along without having any explicit creation mythology and are in no way contradicted by a universe without a beginning or end.] Creatio ex nihilo, even as religious doctrine, only dates to around AD 200. The key is not to confuse myth and empirical results, or religion and science.
Quoted in Anthony L. Peratt, 'Dean of the Plasma Dissidents', Washington Times, supplement: The World and I (May 1988),196.
Science quotes on:  |  Attempt (94)  |  Creatio Ex Nihilo (2)  |  Creation (211)  |  Empiricism (16)  |  Method (154)  |  Myth (43)  |  Reconcile (10)  |  Reject (21)  |  Science And Religion (267)

Since the beginning of physics, symmetry considerations have provided us with an extremely powerful and useful tool in our effort to understand nature. Gradually they have become the backbone of our theoretical formulation of physical laws.
Particle Physics and an Introduction to Field Theory (1981), 177.
Science quotes on:  |  Law (418)  |  Nature (1029)  |  Physics (301)  |  Symmetry (26)  |  Tool (70)  |  Understanding (317)

Something unknown is doing we don’t know what—that is what our theory amounts to.
Expressing the quantum theory description of an electron has no familiar conception of a real form. In The Nature Of The Physical World (1928), 291.
Science quotes on:  |  Knowledge (1128)  |  Quantum Theory (55)  |  Something (9)  |  Unknown (87)

Sometimes a hunch, right or wrong, is sufficient theory to lead to a useful observation.
In On the Management of Statistical Techniques for Quality and Productivity (1981), 86.
Science quotes on:  |  Hunch (4)  |  Hypothesis (227)  |  Lead (101)  |  Observation (418)  |  Right (144)  |  Sufficient (24)  |  Useful (66)  |  Wrong (116)

Spacetime tells matter how to move; matter tells spacetime how to curve.
With co-author Kenneth William Ford Geons, Black Holes, and Quantum Foam: A Life in Physics (1998, 2010), 235. Adapted from his earlier book, co-authored with Charles W. Misner and Kip S. Thorne, Gravitation (1970, 1973), 5, in which one of the ideas in Einstein’s geometric theory of gravity was summarized as, “Space acts on matter, telling it how to move. In turn, matter reacts back on space, telling it how to curve”.
Science quotes on:  |  Curve (16)  |  Albert Einstein (535)  |  Geometry (99)  |  Gravitation (27)  |  Matter (270)  |  Move (58)  |  Spacetime (4)  |  Tell (67)

Statistics: the mathematical theory of ignorance.
…...
Science quotes on:  |  Ignorance (190)  |  Mathematics (587)  |  Statistics (125)

Step by step we cross great eras in the development of thought: there is no sudden gigantic stride; a theory proceeds by slow evolution until it dominates or is destroyed.
In 'Theory of Phlogiston', The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science (Jan 1868), 35, 28-29.
Science quotes on:  |  Destroyed (2)  |  Development (228)  |  Dominate (13)  |  Era (14)  |  Evolution (482)  |  Gigantic (16)  |  Proceed (25)  |  Slow (36)  |  Stride (7)  |  Sudden (21)  |  Thought (374)

Students using astrophysical textbooks remain essentially ignorant of even the existence of plasma concepts, despite the fact that some of them have been known for half a century. The conclusion is that astrophysics is too important to be left in the hands of astrophysicists who have gotten their main knowledge from these textbooks. Earthbound and space telescope data must be treated by scientists who are familiar with laboratory and magnetospheric physics and circuit theory, and of course with modern plasma theory.
[Lamenting the traditional neglect of plasma physics]
Quoted in Anthony L. Peratt, 'Dean of the Plasma Dissidents', Washington Times, supplement: The World and I (May 1988),197.
Science quotes on:  |  Astrophysicist (7)  |  Astrophysics (12)  |  Circuit (12)  |  Concept (102)  |  Data (100)  |  Existence (254)  |  Fact (609)  |  Ignorant (27)  |  Knowledge (1128)  |  Laboratory (120)  |  Neglect (23)  |  Plasma (7)  |  Student (131)  |  Telescope (74)  |  Textbook (19)

Such an atmosphere is un-American, the most un-American thing we have to contend with today. It is the climate of a totalitarian country in which scientists are expected to change their theories to match changes in the police state's propaganda line.
[Stinging rebuke of J. Parnell Thomas, Chairman, House Committee on Un-American activities, who had attacked Dr. Condon (1 Mar 1948) as a weak link in American atomic security.]
Opening address (13 Sep 1953) at the annual meeting of the American Association for the Advancement of Science where Condon would be elected as the new AAAS president. Obituary, New York Times (27 Mar 1974), 46.
Science quotes on:  |  Change (291)  |  Politics (77)  |  Propaganda (6)  |  Scientist (447)  |  Totalitarian (6)

Such is professional jealousy; a scientist will never show any kindness for a theory which he did not start himself.
In A Tramp Abroad (1880), 156.
Science quotes on:  |  Himself (10)  |  Jealousy (7)  |  Kindness (10)  |  Profession (54)  |  Scientist (447)  |  Start (68)

Suppose a number of equal waves of water to move upon the surface of a stagnant lake, with a certain constant velocity, and to enter a narrow channel leading out of the lake. Suppose then another similar cause to have excited another equal series of waves, which arrive at the same time, with the first. Neither series of waves will destroy the other, but their effects will be combined: if they enter the channel in such a manner that the elevations of one series coincide with those of the other, they must together produce a series of greater joint elevations; but if the elevations of one series are so situated as to correspond to the depressions of the other, they must exactly fill up those depressions. And the surface of the water must remain smooth; at least I can discover no alternative, either from theory or from experiment.
A Reply to the Animadversions of the Edinburgh Reviewers on Some Papers Published in the Philosophical Transactions (1804), 17-8.
Science quotes on:  |  Alternative (22)  |  Channel (17)  |  Coincidence (12)  |  Combination (69)  |  Constant (40)  |  Depression (15)  |  Destruction (80)  |  Elevation (4)  |  Experiment (543)  |  Greater (36)  |  Interference (12)  |  Lake (12)  |  Narrow (33)  |  Smooth (13)  |  Stagnant (3)  |  Supposition (33)  |  Surface (74)  |  Velocity (14)  |  Water (244)  |  Wave (55)

Take the rose—most people think it very beautiful: I don’t care for It at all. I prefer the cactus, for the simple reason that it has a more interesting personality. It has wonderfully adapted itself to its surroundings! It is the best illustration of the theory of evolution in plant life.
From George MacAdam, 'Steinmetz, Electricity's Mastermind, Enters Politics', New York Times (2 Nov 1913), SM3.
Science quotes on:  |  Adapt (18)  |  Beautiful (81)  |  Best (129)  |  Cactus (3)  |  Care (73)  |  Evolution (482)  |  Illustration (24)  |  Interesting (38)  |  Life (917)  |  Personality (40)  |  Plant (173)  |  Prefer (18)  |  Reason (330)  |  Rose (7)  |  Simple (111)  |  Surrounding (11)

That is the way of the scientist. He will spend thirty years in building up a mountain range of facts with the intent to prove a certain theory; then he is so happy with his achievement that as a rule he overlooks the main chief fact of all—that all his accumulation proves an entirely different thing.
'The Bee'. In What is Man? and Other Essays? (1917), 283.
Science quotes on:  |  Accumulation (29)  |  Achievement (128)  |  Build (80)  |  Chief (25)  |  Different (110)  |  Fact (609)  |  Happiness (82)  |  Intent (5)  |  Main (16)  |  Mountain (111)  |  Proof (192)  |  Rule (135)  |  Scientist (447)  |  Way (36)

That our knowledge only illuminates a small corner of the Universe, that it is incomplete, approximate, tentative and merely probable need not concert us. It is genuine nevertheless. Physical science stands as one of the great achievements of the human spirit.
Scientific Method: An Inquiry into the Character and Validy of Natural Law (1923), 201-202.
Science quotes on:  |  Knowledge (1128)  |  Physical Science (54)  |  Universe (563)

That the Anatomy of the Nerves yields more pleasant and profitable Speculations, than the Theory of any parts besides in the animated Body: for from hence the true and genuine Reasons are drawn of very many Actions and Passions that are wont to happen in our Body, which otherwise seem most difficult and unexplicable; and no less from this Fountain the hidden Causes of Diseases and their Symptoms, which commonly are ascribed to the Incantations of Witches, may be found out and clearly laid open. But as to our observations about the Nerves, from our following Discourse it will plainly appear, that I have not trod the paths or footsteps of others, nor repeated what hath been before told.
In Anatomy of the Brain and Nerves (1664), trans. Samuel Pordage (1681), reprinted in William Peindel (ed.), Thomas Willis: Anatomy of the Brain and Nerves (1965), Vol. 2, 125.
Science quotes on:  |  Anatomy (59)  |  Discourse (13)  |  Disease (257)  |  Footstep (5)  |  Incantation (4)  |  Nerve (66)  |  Observation (418)  |  Path (59)  |  Speculation (77)  |  Symptom (16)  |  Witch (4)

That theory is worthless. It isn’t even wrong!
…...
Science quotes on:  |  Worthless (15)  |  Wrong (116)

That was the beginning, and the idea seemed so obvious to me and so elegant that I fell deeply in love with it. And, like falling in love with a woman, it is only possible if you do not know much about her, so you cannot see her faults. The faults will become apparent later, but after the love is strong enough to hold you to her. So, I was held to this theory, in spite of all difficulties, by my youthful enthusiasm.
Expressing how his work on quantum electrodynamics began with an original idea. In his Nobel Prize Lecture (11 Dec 1965), 'The Development of the Space-Time View of Quantum Electrodynamics'. Collected in Stig Lundqvist, Nobel Lectures: Physics, 1963-1970 (1998), 157.
Science quotes on:  |  Apparent (26)  |  Beginning (114)  |  Difficulty (113)  |  Elegant (8)  |  Enthusiasm (28)  |  Fault (27)  |  Idea (440)  |  Later (11)  |  Love (164)  |  Obvious (54)  |  Woman (94)

The advance of science is not comparable to the changes of a city, where old edifices are pitilessly torn down to give place to new, but to the continuous evolution of zoologic types which develop ceaselessly and end by becoming unrecognisable to the common sight, but where an expert eye finds always traces of the prior work of the centuries past. One must not think then that the old-fashioned theories have been sterile and vain.
The Value of Science (1905), in The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method(1946), trans. by George Bruce Halsted, 208.
Science quotes on:  |  Advance (123)  |  Century (94)  |  Change (291)  |  City (37)  |  Common (92)  |  Comparison (53)  |  Continuity (23)  |  Demolition (4)  |  Development (228)  |  Edifice (13)  |  End (141)  |  Evolution (482)  |  Expert (42)  |  New (340)  |  Old-Fashioned (5)  |  Past (109)  |  Pity (7)  |  Prior (5)  |  Replacement (8)  |  Science (1699)  |  Sight (25)  |  Sterility (3)  |  Thinking (222)  |  Trace (39)  |  Type (34)  |  Vanity (14)  |  Work (457)  |  Zoology (28)

The aether: Invented by Isaac Newton, reinvented by James Clerk Maxwell. This is the stuff that fills up the empty space of the universe. Discredited and discarded by Einstein, the aether is now making a Nixonian comeback. It’s really the vacuum, but burdened by theoretical, ghostly particles.
In Leon Lederman and Dick Teresi, The God Particle: If the Universe is the Answer, What is the Question (1993, 2006), xiii.
Science quotes on:  |  Aether (8)  |  Burden (23)  |  Discarding (2)  |  Discredit (7)  |  Albert Einstein (535)  |  Emptiness (6)  |  Ghost (20)  |  Invention (283)  |  James (2)  |  Sir Isaac Newton (258)  |  Richard M. Nixon (10)  |  Particle (90)  |  Space (154)  |  Stuff (15)  |  Universe (563)  |  Vacuum (29)

The alternative to the Big Bang is not, in my opinion, the steady state; it is instead the more general theory of continuous creation. Continuous creation can occur in bursts and episodes. These mini-bangs can produce all the wonderful element-building that Fred Hoyle discovered and contributed to cosmology. This kind of element and galaxy formation can take place within an unbounded, non-expanding universe. It will also satisfy precisely the Friedmann solutions of general relativity. It can account very well for all the facts the Big Bang explains—and also for those devastating, contradictory observations which the Big Bang must, at all costs, pretend are not there
In 'Letters: Wrangling Over the Bang', Science News (27 Jul 1991), 140, No. 4, 51. Also quoted in Roy C. Martin, Astronomy on Trial: A Devastating and Complete Repudiation of the Big Bang Fiasco (1999), Appendix I, 217.
Science quotes on:  |  Account (45)  |  Alternative (22)  |  Big Bang (38)  |  Burst (17)  |  Continuous Creation (2)  |  Contradictory (4)  |  Cosmology (17)  |  Devastating (4)  |  Discovery (591)  |  Element (129)  |  Episode (3)  |  Explanation (161)  |  Fact (609)  |  Formation (54)  |  Galaxy (38)  |  General (92)  |  General Relativity (5)  |  Sir Fred Hoyle (7)  |  Observation (418)  |  Occur (26)  |  Opinion (146)  |  Pretend (14)  |  Produce (63)  |  Satisfy (14)  |  Steady State (3)  |  Universe (563)

The ancestors of the higher animals must be regarded as one-celled beings, similar to the Amœbæ which at the present day occur in our rivers, pools, and lakes. The incontrovertible fact that each human individual develops from an egg, which, in common with those of all animals, is a simple cell, most clearly proves that the most remote ancestors of man were primordial animals of this sort, of a form equivalent to a simple cell. When, therefore, the theory of the animal descent of man is condemned as a “horrible, shocking, and immoral” doctrine, tho unalterable fact, which can be proved at any moment under the microscope, that the human egg is a simple cell, which is in no way different to those of other mammals, must equally be pronounced “horrible, shocking, and immoral.”
Translated from his Ueber die Entstehung und den Stammbaum des Menschengeschlechts, (1873), Vol. 2, as an epigraph to Chap. 6, The Evolution of Man, (1879), Vol 1, 120-121.
Science quotes on:  |  Amoeba (20)  |  Ancestor (35)  |  Animal (309)  |  Being (39)  |  Cell (125)  |  Common (92)  |  Condemn (6)  |  Descent (14)  |  Develop (55)  |  Difference (208)  |  Doctrine (53)  |  Egg (41)  |  Equally (18)  |  Equivalent (14)  |  Evolution (482)  |  Fact (609)  |  Higher (28)  |  Horrible (7)  |  Human (445)  |  Immoral (3)  |  Incontrovertible (5)  |  Individual (177)  |  Lake (12)  |  Mammal (28)  |  Microscope (68)  |  Moment (61)  |  Pool (10)  |  Primordial (7)  |  Pronounce (4)  |  Proof (192)  |  Remote (27)  |  River (68)  |  Shocking (3)  |  Simple (111)  |  Unalterable (4)

The architect should be equipped with knowledge of many branches of study and varied kinds of learning, for it is by his judgement that all work done by the other arts is put to test. This knowledge is the child of practice and theory.
Vitruvius
In De Architectura, Book 1, Chap 1, Sec. 1. As translated in Morris Hicky Morgan (trans.), Vitruvius: The Ten Books on Architecture (1914), 3.
Science quotes on:  |  Architect (15)  |  Art (205)  |  Branch (61)  |  Child (189)  |  Education (280)  |  Equipped (4)  |  Judgment (72)  |  Knowledge (1128)  |  Learning (174)  |  Practice (67)  |  Study (331)  |  Test (96)  |  Various (25)  |  Work (457)

The argument advanced by the supporters of the theory of hereditary transmission does not furnish a satisfactory explanation of the cause of the inequalities and diversities of the universe.
Vedanta Philosophy: Five Lectures on Reincarnation (1902), 41.
Science quotes on:  |  Argument (59)  |  Cause (231)  |  Diveristy (2)  |  Explanation (161)  |  Heredity (51)  |  Inequality (6)  |  Satisfactory (9)  |  Transmission (23)  |  Universe (563)

The basic thesis of gestalt theory might be formulated thus: there are contexts in which what is happening in the whole cannot be deduced from the characteristics of the separate pieces, but conversely; what happens to a part of the whole is, in clearcut cases, determined by the laws of the inner structure of its whole.
Lecture at the Kantgesellschaft (Kant Society), Berlin (17 Dec 1924), 'Über Gestalttheorie', as taken down in shorthand. Translated by N. Nairn-Allison in Social Research (1944), 11, 84.
Science quotes on:  |  Basic (52)  |  Case (64)  |  Characteristic (66)  |  Clear-Cut (7)  |  Context (17)  |  Conversely (2)  |  Deduce (8)  |  Determine (45)  |  Formulate (10)  |  Gestalt (3)  |  Happen (63)  |  Inner (27)  |  Law (418)  |  Part (146)  |  Piece (32)  |  Separate (46)  |  Structure (191)  |  Thesis (10)  |  Whole (122)

The best class of scientific mind is the same as the best class of business mind. The great desideratum in either case is to know how much evidence is enough to warrant action. It is as unbusiness-like to want too much evidence before buying or selling as to be content with too little. The same kind of qualities are wanted in either case. The difference is that if the business man makes a mistake, he commonly has to suffer for it, whereas it is rarely that scientific blundering, so long as it is confined to theory, entails loss on the blunderer. On the contrary it very often brings him fame, money and a pension. Hence the business man, if he is a good one, will take greater care not to overdo or underdo things than the scientific man can reasonably be expected to take.
Samuel Butler, Henry Festing Jones (ed.), The Note-Books of Samuel Butler (1917), 217.
Science quotes on:  |  Action (151)  |  Blunder (13)  |  Business (71)  |  Contentment (10)  |  Contrary (22)  |  Desideratum (2)  |  Difference (208)  |  Evidence (157)  |  Expectation (46)  |  Fame (30)  |  Little (126)  |  Loss (62)  |  Mind (544)  |  Mistake (107)  |  Money (125)  |  Pension (2)  |  Quality (65)  |  Rare (31)  |  Scientist (447)  |  Selling (2)  |  Suffering (26)  |  Warrant (2)

The Big Bang theory says nothing about what banged, why it banged, or what happened before it banged.
Alan Guth
As quoted in Neil Swidey, 'Alan Guth: What Made the Big Bang Bang', Boston Globe (2 May 2014).
Science quotes on:  |  Bang (4)  |  Big Bang (38)  |  Happen (63)  |  Nothing (267)

The Big Idea that had been developed in the seventeenth century ... is now known as the scientific method. It says that the way to proceed when investigating how the world works is to first carry out experiments and/or make observations of the natural world. Then, develop hypotheses to explain these observations, and (crucially) use the hypothesis to make predictions about the future outcome of future experiments and/or observations. After comparing the results of those new observations with the predictions of the hypotheses, discard those hypotheses which make false predictions, and retain (at least, for the time being) any hypothesis that makes accurate predictions, elevating it to the status of a theory. Note that a theory can never be proved right. The best that can be said is that it has passed all the tests applied so far.
In The Fellowship: the Story of a Revolution (2005), 275.
Science quotes on:  |  Apply (38)  |  Compare (15)  |  Crucial (8)  |  Develop (55)  |  Discard (14)  |  Experiment (543)  |  Explanation (161)  |  False (79)  |  Future (229)  |  Hypothesis (227)  |  Idea (440)  |  Investigate (49)  |  Observation (418)  |  Prediction (67)  |  Proceed (25)  |  Proof (192)  |  Result (250)  |  Retain (10)  |  Right (144)  |  Scientific Method (155)  |  Test (96)  |  Work (457)  |  World (667)

The catastrophist constructs theories, the uniformitarian demolishes them. The former adduces evidence of an Origin, the latter explains the evidence away.
Aphorism 110, 'Aphorisms Concerning Ideas', The Philosophy of the Inductive Sciences (1840), Vol. 1, xxxvi.
Science quotes on:  |  Construct (25)  |  Demolish (2)  |  Evidence (157)  |  Explain (61)  |  Origin (77)  |  Uniformitarian (4)

The chemist in America has in general been content with what I have called a loafer electron theory. He has imagined the electrons sitting around on dry goods boxes at every corner [viz. the cubic atom], ready to shake hands with, or hold on to similar loafer electrons in other atoms.
'Atomism in Modern Physics', Journal of the Chemical Society (1924), 1411.
Science quotes on:  |  America (74)  |  Box (8)  |  Chemist (79)  |  Content (39)  |  Corner (24)  |  Cube (9)  |  Electron (66)  |  Imagination (209)  |  Loafer (2)  |  Sit (24)

The Chinese, who aspire to be thought an enlightened nation, to this day are ignorant of the circulation of the blood; and even in England the man who made that noble discovery lost all his practice in the consequence of his ingenuity; and Hume informs us that no physician in the United Kingdom who had attained the age of forty ever submitted to become a convert to Harvey’s theory, but went on preferring numpsimus to sumpsimus to the day of his death.
Science quotes on:  |  Anatomy (59)  |  Blood (95)  |  Britain (14)  |  China (17)  |  Circulation (17)  |  Consequence (76)  |  Discovery (591)  |  William Harvey (27)  |  David Hume (33)  |  Ignorant (27)  |  Ingenuity (27)  |  Physician (232)

The complacent manner in which geologists have produced their theories has been extremely amusing; for often with knowledge (and that frequently inaccurate) not extending beyond a given province, they have described the formation of a world with all the detail and air of eye-witnesses. That much good ensues, and that the science is greatly advanced, by the collision of various theories, cannot be doubted. Each party is anxious to support opinions by facts. Thus, new countries are explored, and old districts re-examined; facts come to light that do not suit either party; new theories spring up; and, in the end, a greater insight into the real structure of the earth's surface is obtained.
Sections and Views Illustrative of Geological Phenomena (1830), iii.
Science quotes on:  |  Geology (187)

The confirmation of theories relies on the compact adaption of their parts, by which, like those of an arch or dome, they mutually sustain each other, and form a coherent whole.
Science quotes on:  |  Arch (7)  |  Coherent (12)  |  Confirmation (15)  |  Dome (3)  |  Mutual (22)  |  Sustain (13)

The conflict of theories, leading, as it eventually must, to the survival of the fittest, is advantageous.
In Address (11 Dec 1895) as President of the Geological Society, 'The Origin of Hypotheses, illustrated by the Discussion of a Topographical Problem', printed as Presidential Address of Grove Karl Gilbert (1896), 4. Also collected in Science (1896), 3, 2.

The contents of this section will furnish a very striking illustration of the truth of a remark, which I have more than once made in my philosophical writings, and which can hardly be too often repeated, as it tends greatly to encourage philosophical investigations viz. That more is owing to what we call chance, that is, philosophically speaking, to the observation of events arising from unknown causes, than to any proper design, or pre-conceived theory in this business. This does not appear in the works of those who write synthetically upon these subjects; but would, I doubt not, appear very strikingly in those who are the most celebrated for their philosophical acumen, did they write analytically and ingenuously.
'On Dephlogisticated Air, and the Constitution of the Atmosphere', in The Discovery of Oxygen, Part I, Experiments by Joseph Priestley 1775 (Alembic Club Reprint, 1894), 5.
Science quotes on:  |  Analysis (123)  |  Cause (231)  |  Chance (122)  |  Design (92)  |  Investigation (123)  |  Observation (418)  |  Unknown (87)

The contest [between the wave and particle theories of light] is something like one between a shark and a tiger, each is supreme in its own element but helpless in that of the other.
In Fison Memorial Lecture (7 May 1925) at Guy’s Hospital Medical School, London, published as The Structure of Light: The Fison Memorial Lecture 1925 (1925), 15.
Science quotes on:  |  Contest (5)  |  Helpless (6)  |  Light (246)  |  Particle (90)  |  Shark (6)  |  Supreme (24)  |  Tiger (4)  |  Wave (55)

The description of some of the experiments, which are communicated here, was completely worked out at my writing-table, before I had seen anything of the phenomena in question. After making the experiments on the following day, it was found that nothing in the description required to be altered. I do not mention this from feelings of pride, but in order to make clear the extraordinary ease and security with which the relations in question can be considered on the principles of Arrhenius' theory of free ions. Such facts speak more forcibly then any polemics for the value of this theory .
Philosophical Magazine (1891), 32, 156.
Science quotes on:  |  Alteration (22)  |  Svante Arrhenius (11)  |  Communication (58)  |  Completeness (9)  |  Consideration (65)  |  Description (72)  |  Ease (29)  |  Experiment (543)  |  Extraordinary (32)  |  Fact (609)  |  Feeling (79)  |  Ion (8)  |  Mention (12)  |  Observation (418)  |  Phenomenon (218)  |  Pride (45)  |  Principle (228)  |  Question (315)  |  Relation (96)  |  Security (27)  |  Value (180)

The development of mathematics is largely a natural, not a purely logical one: mathematicians are continually answering questions suggested by astronomers or physicists; many essential mathematical theories are but the reflex outgrowth from physical puzzles.
In 'The Teaching of the History of Science', The Scientific Monthly (Sep 1918), 194.
Science quotes on:  |  Answer (201)  |  Astronomer (50)  |  Continually (14)  |  Development (228)  |  Essential (87)  |  Logical (20)  |  Mathematician (177)  |  Mathematics (587)  |  Natural (128)  |  Outgrowth (3)  |  Physical (94)  |  Physicist (130)  |  Puzzle (30)  |  Question (315)  |  Reflex (9)

The difference between myth and science is the difference between divine inspiration of “unaided reason” (as Bertrand Russell put it) on the one hand and theories developed in observational contact with the real world on the other. It is the difference between the belief in prophets and critical thinking, between Credo quia absurdum (I believe because it is absurd–Tertullian) and De omnibus est dubitandum (Everything should be questioned–Descartes). To try to write a grand cosmical drama leads necessarily to myth. To try to let knowledge substitute ignorance in increasingly large regions of space and time is science.
In 'Cosmology: Myth or Science?' Journal of Astrophysics and Astronomy (1984), 5, 79-98.
Science quotes on:  |  Belief (400)  |  Contact (24)  |  Cosmology (17)  |  René Descartes (43)  |  Difference (208)  |  Divine (42)  |  Drama (10)  |  Ignorance (190)  |  Inspiration (50)  |  Knowledge (1128)  |  Myth (43)  |  Observation (418)  |  Prophet (8)  |  Question (315)  |  Real (95)  |  Reason (330)  |  Bertrand Russell (148)  |  Science (1699)  |  Substitute (23)  |  Thinking (222)  |  Time And Space (30)  |  World (667)  |  Write (87)

The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological rule, and since the demarcation between science and nonscience is vague. But it is more than sharp enough to make a distinction between many physical theories on the one hand, and metaphysical theories, such as psychoanalysis, or Marxism (in its present form), on the other. This is, of course, one of my main theses; and nobody who has not understood it can be said to have understood my theory.
The situation with Marxism is, incidentally, very different from that with psychoanalysis. Marxism was once a scientific theory: it predicted that capitalism would lead to increasing misery and, through a more or less mild revolution, to socialism; it predicted that this would happen first in the technically highest developed countries; and it predicted that the technical evolution of the 'means of production' would lead to social, political, and ideological developments, rather than the other way round.
But the (so-called) socialist revolution came first in one of the technically backward countries. And instead of the means of production producing a new ideology, it was Lenin's and Stalin's ideology that Russia must push forward with its industrialization ('Socialism is dictatorship of the proletariat plus electrification') which promoted the new development of the means of production.
Thus one might say that Marxism was once a science, but one which was refuted by some of the facts which happened to clash with its predictions (I have here mentioned just a few of these facts).
However, Marxism is no longer a science; for it broke the methodological rule that we must accept falsification, and it immunized itself against the most blatant refutations of its predictions. Ever since then, it can be described only as nonscience—as a metaphysical dream, if you like, married to a cruel reality.
Psychoanalysis is a very different case. It is an interesting psychological metaphysics (and no doubt there is some truth in it, as there is so often in metaphysical ideas), but it never was a science. There may be lots of people who are Freudian or Adlerian cases: Freud himself was clearly a Freudian case, and Adler an Adlerian case. But what prevents their theories from being scientific in the sense here described is, very simply, that they do not exclude any physically possible human behaviour. Whatever anybody may do is, in principle, explicable in Freudian or Adlerian terms. (Adler's break with Freud was more Adlerian than Freudian, but Freud never looked on it as a refutation of his theory.)
The point is very clear. Neither Freud nor Adler excludes any particular person's acting in any particular way, whatever the outward circumstances. Whether a man sacrificed his life to rescue a drowning, child (a case of sublimation) or whether he murdered the child by drowning him (a case of repression) could not possibly be predicted or excluded by Freud's theory; the theory was compatible with everything that could happen—even without any special immunization treatment.
Thus while Marxism became non-scientific by its adoption of an immunizing strategy, psychoanalysis was immune to start with, and remained so. In contrast, most physical theories are pretty free of immunizing tactics and highly falsifiable to start with. As a rule, they exclude an infinity of conceivable possibilities.
'The Problem of Demarcation' (1974). Collected in David Miller (ed.) Popper Selections (1985), 127-128.
Science quotes on:  |  Alfred Adler (3)  |  Falsification (7)  |  Sigmund Freud (66)  |  Marxism (3)  |  Metaphysics (30)  |  Methodology (8)  |  Psychoanalysis (37)  |  Refutation (10)  |  Truth (750)

The dimmed outlines of phenomenal things all merge into one another unless we put on the focusing-glass of theory, and screw it up sometimes to one pitch of definition and sometimes to another, so as to see down into different depths through the great millstone of the world.
Are There Real Analogies in Nature?' (Feb 1856). Quoted in Lewis Campbell and William GarnettThe Life of James Clerk Maxwell (1882), 237.

The discovery of the telephone has made us acquainted with many strange phenomena. It has enabled us, amongst other things, to establish beyond a doubt the fact that electric currents actually traverse the earth's crust. The theory that the earth acts as a great reservoir for electricity may be placed in the physicist's waste-paper basket, with phlogiston, the materiality of light, and other old-time hypotheses.
From Recent Progress in Telephony: British Association Report (1882). Excerpted in John Joseph Fahie, A History of Wireless Telegraphy (1902), 136.
Science quotes on:  |  Basket (5)  |  Crust (17)  |  Current (43)  |  Discovery (591)  |  Doubt (121)  |  Earth (487)  |  Electricity (121)  |  Enabling (7)  |  Fact (609)  |  Hypothesis (227)  |  Light (246)  |  Materiality (2)  |  Phenomenon (218)  |  Phlogiston (9)  |  Physicist (130)  |  Strange (61)  |  Telephone (21)  |  Traverse (4)

The discovery which has been pointed to by theory is always one of profound interest and importance, but it is usually the close and crown of a long and fruitful period, whereas the discovery which comes as a puzzle and surprise usually marks a fresh epoch and opens a new chapter in science.
Becquerel Memorial Lecture, Journal of the Chemical Society, Transactions (1912), 101(2), 2005. Quoted by Simon Flexnor in 'The Scientific Career for Women', a commencement address at Bryn Mawr College (2 Jun 1921), The Scientific Monthly (Aug 1921), 13, 98.
Science quotes on:  |  Discovery (591)  |  Surprise (44)

The dispute between evolutionists and creation scientists offers textbook writers and teachers a wonderful opportunity to provide students with insights into the philosophy and methods of science. … What students really need to know is … how scientists judge the merit of a theory. Suppose students were taught the criteria of scientific theory evaluation and then were asked to apply these criteria … to the two theories in question. Wouldn’t such a task qualify as authentic science education? … I suspect that when these two theories are put side by side, and students are given the freedom to judge their merit as science, creation theory will fail ignominiously (although natural selection is far from faultless). … It is not only bad science to allow disputes over theory to go unexamined, but also bad education.
In Building a Bridge to the 18th Century: How the Past Can Improve Our Future (1999), 168.
Science quotes on:  |  Allow (24)  |  Authentic (3)  |  Bad Science (2)  |  Creationist (15)  |  Criterion (10)  |  Dispute (15)  |  Education (280)  |  Evaluation (5)  |  Evolutionist (7)  |  Examine (24)  |  Fail (34)  |  Fault (27)  |  Freedom (76)  |  Insight (57)  |  Judge (43)  |  Merit (25)  |  Natural Selection (79)  |  Opportunity (43)  |  Philosophy (213)  |  Science And Education (15)  |  Scientific Method (155)  |  Student (131)  |  Teacher (90)  |  Textbook (19)  |  Writer (35)

The empirical basis of objective science has nothing “absolute” about it. Science does not rest upon solid bedrock. The bold structure of its theories rises, as it were, above a swamp. It is like a building erected on piles. The piles are driven down from above into the swamp, but not down to any natural or “given” base; and when we cease our attempts to drive our piles into a deeper layer, it is not because we have reached firm ground. We simply stop when we are satisfied that they are firm enough to carry the structure, at least for the time being.
The Logic of Scientific Discovery: Logik Der Forschung (1959, 2002), 94.
Science quotes on:  |  Science (1699)

The engineer is concerned to travel from the abstract to the concrete. He begins with an idea and ends with an object. He journeys from theory to practice. The scientist’s job is the precise opposite. He explores nature with his telescopes or microscopes, or much more sophisticated techniques, and feeds into a computer what he finds or sees in an attempt to define mathematically its significance and relationships. He travels from the real to the symbolic, from the concrete to the abstract. The scientist and the engineer are the mirror image of each other.
In The Development of Design (1981), 19-20.
Science quotes on:  |  Abstract (43)  |  Attempt (94)  |  Beginning (114)  |  Computer (84)  |  Concrete (21)  |  Definition (152)  |  End (141)  |  Engineer (72)  |  Exploration (93)  |  Idea (440)  |  Image (38)  |  Job (33)  |  Journey (19)  |  Mathematics (587)  |  Microscope (68)  |  Mirror (21)  |  Nature (1029)  |  Object (110)  |  Opposite (39)  |  Practice (67)  |  Real (95)  |  Relationship (59)  |  Science And Engineering (11)  |  Scientist (447)  |  Significance (60)  |  Sophistication (8)  |  Symbolic (6)  |  Technique (41)  |  Telescope (74)  |  Travelling (3)

The entire annals of Observation probably do not elsewhere exhibit so extraordinary a verification of any theoretical conjecture adventured on by the human spirit!
[On the mathematical work by Urbain Le Verrier predicting the planet Neptune.]
In The Planet Neptune: An Exposition and History (1848), 90. The verification of the existence of the planet Neptune was made when Johan Galle found a star in an evening observation at the position predicted in the letter he received from Le Verrier earlier that same day.
Science quotes on:  |  Adventure (36)  |  Conjecture (22)  |  Exhibition (2)  |  Extraordinary (32)  |  Human Spirit (8)  |  Neptune (8)  |  Observation (418)  |  Verification (20)  |  Urbain-Jean-Joseph Le Verrier (4)

The eventual goal of science is to provide a single theory that describes the whole universe.
…...
Science quotes on:  |  Describe (38)  |  Eventual (5)  |  Goal (81)  |  Provide (48)  |  Science (1699)  |  Single (72)  |  Universe (563)  |  Whole (122)

The evolution of higher and of lower forms of life is as well and as soundly established as the eternal hills. It has long since ceased to be a theory; it is a law of Nature as universal in living things as is the law of gravitation in material things and in the motions of the heavenly spheres.
Evolution and Religion in Education (1926), 118.
Science quotes on:  |  Body (193)  |  Cessation (10)  |  Establishment (29)  |  Eternal (43)  |  Evolution (482)  |  Form (210)  |  Heaven (118)  |  Hill (19)  |  Law Of Gravitation (15)  |  Law Of Nature (52)  |  Life (917)  |  Motion (127)

The existence of these patterns [fractals] challenges us to study forms that Euclid leaves aside as being formless, to investigate the morphology of the amorphous. Mathematicians have disdained this challenge, however, and have increasingly chosen to flee from nature by devising theories unrelated to anything we can see or feel.
The Fractal Geometry of Nature (1977, 1983), Introduction, xiii.
Science quotes on:  |  Challenge (37)  |  Euclid (28)  |  Fractal (9)  |  Mathematician (177)  |  Nature (1029)  |  Pattern (56)  |  Sense (240)  |  Study (331)

The experimental investigation by which Ampere established the law of the mechanical action between electric currents is one of the most brilliant achievements in science. The whole theory and experiment, seems as if it had leaped, full grown and full armed, from the brain of the 'Newton of Electricity'. It is perfect in form, and unassailable in accuracy, and it is summed up in a formula from which all the phenomena may be deduced, and which must always remain the cardinal formula of electro-dynamics.
A Treatise on Electricity and Magnetism (1873), Vol. 2, 162.
Science quotes on:  |  Accuracy (52)  |  Achievement (128)  |  André-Marie Ampère (10)  |  Brain (181)  |  Cardinal (4)  |  Current (43)  |  Deduction (49)  |  Electricity (121)  |  Electrodynamics (3)  |  Experiment (543)  |  Formula (51)  |  Investigation (123)  |  Law (418)  |  Leap (23)  |  Mechanics (44)  |  Perfection (71)  |  Phenomenon (218)  |  Summary (4)

The extracellular genesis of cells in animals seemed to me, ever since the publication of the cell theory [of Schwann], just as unlikely as the spontaneous generation of organisms. These doubts produced my observations on the multiplication of blood cells by division in bird and mammalian embryos and on the division of muscle bundles in frog larvae. Since then I have continued these observations in frog larvae, where it is possible to follow the history of tissues back to segmentation.
'Ueber extracellulare Eutstehung thierischer Zelleu und üüber Vermehrung derselben durch Theilung', Archiv für Anatomie, Physiologie und Wissenschaftliche Medicin (1852), 1, 49-50. Quoted in Erwin H. Ackerknecht, Rudolf Virchow: Doctor Statesman Anthropologist (1953), 83-4.
Science quotes on:  |  Animal (309)  |  Bird (96)  |  Blood (95)  |  Bundle (7)  |  Cell (125)  |  Continuation (17)  |  Division (27)  |  Doubt (121)  |  Embryo (22)  |  Frog (30)  |  Generation (111)  |  Genesis (13)  |  History (302)  |  Larva (4)  |  Mammal (28)  |  Multiplication (14)  |  Muscle (32)  |  Observation (418)  |  Organism (126)  |  Publication (83)  |  Theodor Schwann (12)  |  Segmentation (2)  |  Spontaneity (4)  |  Tissue (24)

The fact that Science walks forward on two feet, namely theory and experiment, is nowhere better illustrated than in the two fields for slight contributions to which you have done me the great honour of awarding the the Nobel Prize in Physics for the year 1923. Sometimes it is one foot that is put forward first, sometimes the other, but continuous progress is only made by the use of both—by theorizing and then testing, or by finding new relations in the process of experimenting and then bringing the theoretical foot up and pushing it on beyond, and so on in unending alterations.
'The Electron and the Light-quant from the Experimental Point of View', Nobel Lecture (23 May 1924). In Nobel Lectures: Physics 1922-1941 (1998), 54.
Science quotes on:  |  Alteration (22)  |  Beyond (65)  |  Continuous (24)  |  Experiment (543)  |  Honour (23)  |  Nobel Prize (26)  |  Physics (301)  |  Process (201)  |  Progress (317)  |  Relation (96)  |  Science (1699)  |  Test (96)  |  Unending (3)

The farther a mathematical theory is developed, the more harmoniously and uniformly does its construction proceed, and unsuspected relations are disclosed between hitherto separated branches of the science.
In 'Mathematical Problems', Lecture at the International Congress of Mathematics, Paris, (8 Aug 1900). Translated by Dr. Maby Winton Newson in Bulletin of the American Mathematical Society (1902), 8, 479.
Science quotes on:  |  Branch (61)  |  Construction (69)  |  Developed (8)  |  Harmonious (4)  |  Mathematics (587)  |  Proceed (25)  |  Relation (96)  |  Science (1699)  |  Separate (46)  |  Uniform (14)  |  Unsuspected (5)

The fundamental biological variant is DNA. That is why Mendel's definition of the gene as the unvarying bearer of hereditary traits, its chemical identification by Avery (confirmed by Hershey), and the elucidation by Watson and Crick of the structural basis of its replicative invariance, are without any doubt the most important discoveries ever made in biology. To this must be added the theory of natural selection, whose certainty and full significance were established only by those later theories.
In Jacques Monod and Austryn Wainhouse (trans.), Chance and Necessity: An Essay on the Natural Philosophy of Modern Biology (1971), 104.
Science quotes on:  |  Oswald Avery (4)  |  Biology (150)  |  Confirmation (15)  |  Francis Crick (58)  |  Definition (152)  |  Discovery (591)  |  DNA (67)  |  Elucidation (6)  |  Fundamental (122)  |  Gene (68)  |  Heredity (51)  |  Identification (11)  |  Importance (183)  |  Invariance (3)  |  Gregor Mendel (20)  |  Natural Selection (79)  |  Replication (7)  |  Structure (191)  |  Trait (19)  |  Variant (2)  |  James Watson (33)

The generalized theory of relativity has furnished still more remarkable results. This considers not only uniform but also accelerated motion. In particular, it is based on the impossibility of distinguishing an acceleration from the gravitation or other force which produces it. Three consequences of the theory may be mentioned of which two have been confirmed while the third is still on trial: (1) It gives a correct explanation of the residual motion of forty-three seconds of arc per century of the perihelion of Mercury. (2) It predicts the deviation which a ray of light from a star should experience on passing near a large gravitating body, the sun, namely, 1".7. On Newton's corpuscular theory this should be only half as great. As a result of the measurements of the photographs of the eclipse of 1921 the number found was much nearer to the prediction of Einstein, and was inversely proportional to the distance from the center of the sun, in further confirmation of the theory. (3) The theory predicts a displacement of the solar spectral lines, and it seems that this prediction is also verified.
Studies in Optics (1927), 160-1.
Science quotes on:  |  Arc (5)  |  Confirmation (15)  |  Consequence (76)  |  Corpuscle (8)  |  Deviation (11)  |  Eclipse (16)  |  Explanation (161)  |  Gravitation (27)  |  Light (246)  |  Mercury (39)  |  Sir Isaac Newton (258)  |  Photograph (17)  |  Relativity (50)  |  Result (250)  |  Star (251)

The history of acceptance of new theories frequently shows the following steps: At first the new idea is treated as pure nonsense, not worth looking at. Then comes a time when a multitude of contradictory objections are raised, such as: the new theory is too fancy, or merely a new terminology; it is not fruitful, or simply wrong. Finally a state is reached when everyone seems to claim that he had always followed this theory. This usually marks the last state before general acceptance.
In 'Field Theory and the Phase Space', collected in Melvin Herman Marx, Psychological Theory: Contemporary Readings (1951), 299.
Science quotes on:  |  Acceptance (41)  |  Claim (52)  |  Contradictory (4)  |  Fancy (16)  |  Finally (10)  |  First (174)  |  Following (16)  |  Fruitful (31)  |  General (92)  |  History (302)  |  Idea (440)  |  Merely (35)  |  Multitude (14)  |  New (340)  |  Nonsense (32)  |  Objection (16)  |  Pure (62)  |  Raised (3)  |  Reach (68)  |  State (96)  |  Step (67)  |  Terminology (7)  |  Treatment (88)  |  Wrong (116)

The history of science shows so many examples of the 'irrational' notions and theories of to-day becoming the 'rational' notions and theories of to-morrow, that it seems largely a matter of being accustomed to them whether they are considered rational or not, natural or not.
Natural Law and Divine Miracle: The Principle of Uniformity in Geology, Biology and Theology (1963),167.
Science quotes on:  |  Accustom (7)  |  History Of Science (53)  |  Rational (42)

The incomplete knowledge of a system must be an essential part of every formulation in quantum theory. Quantum theoretical laws must be of a statistical kind. To give an example: we know that the radium atom emits alpha-radiation. Quantum theory can give us an indication of the probability that the alpha-particle will leave the nucleus in unit time, but it cannot predict at what precise point in time the emission will occur, for this is uncertain in principle.
The Physicist's Conception of Nature (1958), 41.
Science quotes on:  |  Alpha Particle (2)  |  Probability (83)  |  Quantum Physics (16)  |  Radioactivity (26)  |  Uncertainty (37)

The initial stage, the act of conceiving or inventing a theory, seems to me neither to call for logical analysis nor to be susceptible of it. (1959)
The Logic of Scientific Discovery: Logik Der Forschung (2002), 7.

The intensity and quantity of polemical literature on scientific problems frequently varies inversely as the number of direct observations on which the discussions are based: the number and variety of theories concerning a subject thus often form a coefficient of our ignorance. Beyond the superficial observations, direct and indirect, made by geologists, not extending below about one two-hundredth of the Earth's radius, we have to trust to the deductions of mathematicians for our ideas regarding the interior of the Earth; and they have provided us successively with every permutation and combination possible of the three physical states of matter—solid, liquid, and gaseous.
'Address delivered by the President of Section [Geology] at Sydney (Friday, Aug 21), Report of the Eighty-Fourth Meeting of the British Association for the Advancement of Science: Australia 1914, 1915, 345.
Science quotes on:  |  Deduction (49)  |  Discussion (37)  |  Earth (487)  |  Geology (187)  |  Ignorance (190)  |  Mathematics (587)  |  Observation (418)  |  Publication (83)

The job of theorists, especially in biology, is to suggest new experiments. A good theory makes not only predictions, but surprising predictions that then turn out to be true. (If its predictions appear obvious to experimentalists, why would they need a theory?)
In What Mad Pursuit: A Personal View of Scientific Discovery (1988), 142.
Science quotes on:  |  Appear (55)  |  Biology (150)  |  Experiment (543)  |  Experimenter (18)  |  Good (228)  |  Need (211)  |  New (340)  |  Obvious (54)  |  Prediction (67)  |  Suggest (15)  |  Surprise (44)  |  Theorist (24)  |  True (120)

The laws of science are the permanent contributions to knowledge—the individual pieces that are fitted together in an attempt to form a picture of the physical universe in action. As the pieces fall into place, we often catch glimpses of emerging patterns, called theories; they set us searching for the missing pieces that will fill in the gaps and complete the patterns. These theories, these provisional interpretations of the data in hand, are mere working hypotheses, and they are treated with scant respect until they can be tested by new pieces of the puzzle.
In Commencement Address, California Institute of Technology (10 Jun 1938), 'Experiment and Experience'. Collected in abridged form in The Huntington Library Quarterly (Apr 1939), 2, No. 3, 244.
Science quotes on:  |  Complete (43)  |  Contribution (49)  |  Data (100)  |  Emerging (2)  |  Gap (20)  |  Glimpse (9)  |  Hypothesis (227)  |  Interpretation (61)  |  Knowledge (1128)  |  Law (418)  |  Missing (7)  |  New (340)  |  Pattern (56)  |  Permanent (18)  |  Physical (94)  |  Picture (55)  |  Piece (32)  |  Provisional (4)  |  Puzzle (30)  |  Respect (57)  |  Science (1699)  |  Search (85)  |  Test (96)  |  Universe (563)

The layman, taught to revere scientists for their absolute respect for the observed facts, and for the judiciously detached and purely provisional manner in which they hold scientific theories (always ready to abandon a theory at the sight of any contradictory evidence) might well have thought that, at [Dayton C.] Miller's announcement of this overwhelming evidence of a “positive effect” [indicating that the speed of light is not independent from the motion of the observer, as Einstein's theory of relativity demands] in his presidential address to the American Physical Society on December 29th, 1925, his audience would have instantly abandoned the theory of relativity. Or, at the very least, that scientists—wont to look down from the pinnacle of their intellectual humility upon the rest of dogmatic mankind—might suspend judgment in this matter until Miller's results could be accounted for without impairing the theory of relativity. But no: by that time they had so well closed their minds to any suggestion which threatened the new rationality achieved by Einstein's world-picture, that it was almost impossible for them to think again in different terms. Little attention was paid to the experiments, the evidence being set aside in the hope that it would one day turn out to be wrong.
Personal Knowledge: Towards a Post-Critical Philosophy (1958, 1998), 13. Miller had earlier presented his evidence against the validity of the relativity theory at the annual meeting, 28 Apr 1925, of the National Academy of Sciences. Miller believed he had, by a much-refined and improved repetition of the so-called Michelson-Morley experiment, shown that there is a definite and measurable motion of the earth through the ether. In 1955, a paper by R.S. Shankland, et al., in Rev. Modern Phys. (1955), 27, 167, concluded that statistical fluctuations and temperature effects in the data had simulated what Miller had taken to be he apparent ether drift.
Science quotes on:  |  Attention (76)  |  Albert Einstein (535)  |  Evidence (157)  |  Experiment (543)  |  Fact (609)  |  Layman (13)  |  Objectivity (9)  |  Observation (418)  |  Relativity (50)  |  Respect (57)  |  Reverence (24)

The lessons of science should be experimental also. The sight of a planet through a telescope is worth all the course on astronomy; the shock of the electric spark in the elbow outvalues all theories; the taste of the nitrous oxide, the firing of an artificial volcano, are better than volumes of chemistry.
The Prose Works of Ralph Waldo Emerson (1870), 552.
Science quotes on:  |  Astronomy (175)  |  Chemistry (239)  |  Elbow (2)  |  Electricity (121)  |  Experiment (543)  |  Lesson (32)  |  Nitrous Oxide (3)  |  Planet (199)  |  Science (1699)  |  Shock (12)  |  Spark (18)  |  Telescope (74)  |  Volcano (36)  |  Worth (74)

The longing to behold this pre-established harmony [of phenomena and theoretical principles] is the source of the inexhaustible patience and perseverance with which Planck has devoted himself ... The state of mind which enables a man to do work of this kind is akin to that of the religious worshiper or the lover; the daily effort comes from no deliberate intention or program, but straight from the heart.
Address (1918) for Max Planck's 60th birthday, at Physical Society, Berlin, 'Principles of Research' in Essays in Science (1934), 4-5.
Science quotes on:  |  Devotion (24)  |  Effort (94)  |  Harmony (55)  |  Heart (110)  |  Inexhaustible (10)  |  Intention (25)  |  Longing (8)  |  Love (164)  |  Patience (31)  |  Perseverance (15)  |  Phenomenon (218)  |  Max Planck (62)  |  Program (32)  |  Religion (210)  |  Research (517)  |  State Of Mind (4)  |  Work (457)  |  Worship (22)

The loveliest theories are being overthrown by these damned experiments; it's no fun being a chemist anymore.
Liebig to Berzelius, 22 Jul 1834. Quoted in J. Carriere (ed.), Berzelius und Liebig: ihre Briefe (1898), 94. Trans. W. H. Brock.
Science quotes on:  |  Chemist (79)  |  Experiment (543)  |  Fun (28)  |  Overthrown (5)

The mathematicians have been very much absorbed with finding the general solution of algebraic equations, and several of them have tried to prove the impossibility of it. However, if I am not mistaken, they have not as yet succeeded. I therefore dare hope that the mathematicians will receive this memoir with good will, for its purpose is to fill this gap in the theory of algebraic equations.
Opening of Memoir on Algebraic Equations, Proving the Impossibility of a Solution of the General Equation of the Fifth Degree. The paper was originally published (1824) in French, as a pamphlet, in Oslo. Collected in Œuvres Complètes (1881), Vol. 1, 28. Translation by W.H. Langdon collected in David Eugene Smith, A Source Book in Mathematics (2012), 261. In this work, he showed why—despite two centuries of efforts by mathematicians—solving equations of the fifth degree would remain futile. The insights from this paper led to the modern theory of equations.
Science quotes on:  |  Absorbed (3)  |  Dare (22)  |  Equation (69)  |  Fill (35)  |  Finding (30)  |  Gap (20)  |  General (92)  |  Good (228)  |  Hope (129)  |  Impossibility (50)  |  Mathematician (177)  |  Memoir (5)  |  Mistaken (3)  |  Prove (60)  |  Purpose (138)  |  Receive (39)  |  Several (14)  |  Solution (168)  |  Succeeded (2)

The method of inquiry which all our ingenious Theorists of the Earth have pursued is certainly erroneous. They first form an hypothesis to solve the phenomena, but in fact the Phenomena are always used as a prop to the hypothesis.
Instead therefore of attempting to cut the gordian knot by Hypothetical analysis, we shall follow the synthetic method of inquiry and content ourselves with endeavouring to establish facts rather than attempt solutions and try by experiments how far that method may leave us thro' the mazes of this subject
Introduction to his lecture course. In Robert Jameson, edited by H. W. Scott, Lectures on Geology, (1966), 27. In Patrick Wyse Jackson, Four Centuries of Geological Travel (2007), 33.
Science quotes on:  |  Enquiry (75)  |  Experiment (543)  |  Fact (609)  |  Geology (187)  |  Hypothesis (227)

The method of science depends on our attempts to describe the world with simple theories: theories that are complex may become untestable, even if they happen to be true. Science may be described as the art of systematic over-simplification—the art of discerning what we may with advantage omit.
Karl Raimund Popper and William Warren Bartley (ed.), The Open Universe: an Argument for Indeterminism (1991), 44. by Karl Raimund Popper, William Warren Bartley - Science - 1991
Science quotes on:  |  Complexity (80)  |  Description (72)  |  Discern (7)  |  Omit (4)  |  Scientific Method (155)  |  Simplicity (126)  |  Test (96)  |  Truth (750)

The moment a person forms a theory, his imagination sees, in every object, only the traits which favor that theory.
In Letter (20 Sep 1787) to Charles Thompson. Collected in Thomas Jefferson Randolph, Memoirs, Correspondence, and Private Papers of Thomas Jefferson (1829), Vol. 2, 223.
Science quotes on:  |  Favor (22)  |  Imagination (209)  |  Trait (19)

The moment one has offered an original explanation for a phenomenon which seems satisfactory, that moment affection for his intellectual child springs into existence, and as the explanation grows into a definite theory his parental affections cluster about his offspring and it grows more and more dear to him. ... There springs up also unwittingly a pressing of the theory to make it fit the facts and a pressing of the facts to make them fit the theory... To avoid this grave danger, the method of multiple working hypotheses is urged. It differs from the simple working hypothesis in that it distributes the effort and divides the affections... In developing the multiple hypotheses, the effort is to bring up into view every rational exploration of the phenomenon in hand and to develop every tenable hypothesis relative to its nature, cause or origin, and to give to all of these as impartially as possible a working form and a due place in the investigation. The investigator thus becomes the parent of a family of hypotheses; and by his parental relations to all is morally forbidden to fasten his affections unduly upon anyone. ... Each hypothesis suggests its own criteria, its own method of proof, its own method of developing the truth, and if a group of hypotheses encompass the subject on all sides, the total outcome of means and of methods is full and rich.
'Studies for Students. The Method of Multiple Working Hypotheses', Journal of Geology (1897), 5, 840-6.
Science quotes on:  |  Hypothesis (227)  |  Scientific Method (155)

The moment you encounter string theory and realise that almost all of the major developments in physics over the last hundred years emerge—and emerge with such elegance—from such a simple starting point, you realise that this incredibly compelling theory is in a class of its own.
…...
Science quotes on:  |  Class (64)  |  Compel (14)  |  Development (228)  |  Elegance (20)  |  Emerge (16)  |  Encounter (14)  |  Hundred (46)  |  Incredibly (3)  |  Major (24)  |  Moment (61)  |  Physics (301)  |  Realise (12)  |  Simple (111)  |  Starting Point (6)  |  String Theory (10)  |  Year (214)

The more experiences and experiments accumulate in the exploration of nature, the more precarious the theories become. But it is not always good to discard them immediately on this account. For every hypothesis which once was sound was useful for thinking of previous phenomena in the proper interrelations and for keeping them in context. We ought to set down contradictory experiences separately, until enough have accumulated to make building a new structure worthwhile.
Lichtenberg: Aphorisms & Letters (1969), 61.
Science quotes on:  |  Accumulation (29)  |  Context (17)  |  Contradiction (44)  |  Discard (14)  |  Experience (268)  |  Experiment (543)  |  Exploration (93)  |  Hypothesis (227)  |  Interrelation (6)  |  Nature (1029)  |  Phenomenon (218)  |  Precarious (4)  |  Structure (191)  |  Thinking (222)  |  Usefulness (70)

The more I think about the physical portion of Schrödinger’s theory, the more repulsive I find it…. What Schrödinger writes about the visualizability of his theory “is probably not quite right”; in other words it’s crap.
Letter to Wolfgang Pauli (8 Jun 1926). 17. In a subsequent letter to Pauli, he referred to Dirac’s theory as “learned crap.”
Science quotes on:  |  Opinion (146)  |  Repulsive (7)  |  Erwin Schrödinger (65)  |  Trash (2)

The most dangerous tendency of the modern world is the way in which bogus theories are given the force of dogma.
The Lord of History (1958), 103.
Science quotes on:  |  Dogma (25)

The most practical solution is a good theory.
Epigraph, without citation, in Eberhard Zeidler, Applied Functional Analysis: main principles and their applications (1995), 1.
Science quotes on:  |  Good (228)  |  Practical (93)  |  Solution (168)

The Newton of drift theory has not yet appeared. His absence need cause no anxiety; the theory is still young and still often treated with suspicion. In the long run, one cannot blame a theoretician for hesitating to spend time and trouble on explaining a law about whose validity no unanimity prevails.
In The Origins of Continents and Oceans (4th ed. 1929), trans. John Biram (1966), 167.
Science quotes on:  |  Anxiety (15)  |  Continental Drift (9)  |  Explanation (161)  |  Law (418)  |  Sir Isaac Newton (258)  |  Plate Tectonics (20)  |  Suspicion (25)  |  Theorist (24)  |  Validity (22)  |  Young (72)

The old scientific ideal of episteme — of absolutely certain, demonstrable knowledge — has proved to be an idol. The demand for scientific objectivity makes it inevitable that every scientific statement must remain tentative for ever. (1959)
The Logic of Scientific Discovery: Logik Der Forschung (2002), 280.
Science quotes on:  |  Certainty (97)  |  Proof (192)

The only sure foundations of medicine are, an intimate knowledge of the human body, and observation on the effects of medicinal substances on that. The anatomical and clinical schools, therefore, are those in which the young physician should be formed. If he enters with innocence that of the theory of medicine, it is scarcely possible he should come out untainted with error. His mind must be strong indeed, if, rising above juvenile credulity, it can maintain a wise infidelity against the authority of his instructors, and the bewitching delusions of their theories.
In letter to Caspar Wistar (21 Jun 1807), collected in Thomas Jefferson Randolph (ed.), Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson (1829), Vol. 4, 93.
Science quotes on:  |  Anatomy (59)  |  Authority (50)  |  Clinic (4)  |  Credulity (8)  |  Delusion (13)  |  Error (230)  |  Foundation (75)  |  Infidelity (3)  |  Innocence (10)  |  Instructor (4)  |  Juvenile (3)  |  Knowledge (1128)  |  Medicine (322)  |  Physician (232)  |  School (87)  |  Taint (4)  |  Wisdom (151)

The owner of the means of production is in a position to purchase the labor power of the worker. By using the means of production, the worker produces new goods which become the property of the capitalist. The essential point about this process is the relation between what the worker produces and what he is paid, both measured in terms of real value. In so far as the labor contract is free what the worker receives is determined not by the real value of the goods he produces, but by his minimum needs and by the capitalists’ requirements for labor power in relation to the number of workers competing for jobs. It is important to understand that even in theory the payment of the worker is not determined by the value of his product.
…...
Science quotes on:  |  Become (100)  |  Both (52)  |  Capitalist (6)  |  Compete (4)  |  Contract (8)  |  Determine (45)  |  Essential (87)  |  Far (77)  |  Free (59)  |  Goods (6)  |  Important (124)  |  Job (33)  |  Labor (53)  |  Means (109)  |  Measure (70)  |  Minimum (10)  |  Need (211)  |  New (340)  |  Number (179)  |  Owner (4)  |  Pay (30)  |  Payment (6)  |  Point (72)  |  Position (54)  |  Power (273)  |  Process (201)  |  Produce (63)  |  Product (72)  |  Production (105)  |  Property (96)  |  Purchase (5)  |  Real (95)  |  Receive (39)  |  Relation (96)  |  Requirement (45)  |  Term (87)  |  Understand (189)  |  Value (180)  |  Worker (23)

The philosopher of science is not much interested in the thought processes which lead to scientific discoveries; he looks for a logical analysis of the completed theory, including the establishing its validity. That is, he is not interested in the context of discovery, but in the context of justification.
'The Philosophical Significance of the Theory of Relativity' (1938). Collected in P.A. Schillp (ed.). Albert Einstein: Philosopher-Scientist (1949, 1970), 292. Cited in G. Holton, Thematic Origins of Scientific Thought (1973), 7.
Science quotes on:  |  Analysis (123)  |  Completion (15)  |  Context (17)  |  Discovery (591)  |  Establishment (29)  |  Interest (170)  |  Justification (33)  |  Logic (187)  |  Philosophy (213)  |  Process (201)  |  Validity (22)

The philosopher of science is not much interested in the thought processes which lead to scientific discoveries; he looks for a logical analysis of the completed theory, including the relationships establishing its validity. That is, he is not interested in the context of discovery, but in the context of justification.
In'The Philosophical Significance of the Theory of Relativity' (1949), collected in P.A. Schilpp (ed), Albert Einstein: Philosopher-Scientist (1969), 292. As quoted and cited in Stanley Goldberg, Understanding Relativity: Origin and Impact of a Scientific Revolution (1984, 2013), 306.
Science quotes on:  |  Analysis (123)  |  Context (17)  |  Discovery (591)  |  Justification (33)  |  Logic (187)  |  Process (201)  |  Relationship (59)  |  Science And Philosophy (4)  |  Thought (374)  |  Validity (22)

The physicist cannot simply surrender to the philosopher the critical contemplation of the theoretical foundations for he himself knows best and feels most surely where the shoe pinches. … he must try to make clear in his own mind just how far the concepts which he uses are justified … The whole of science is nothing more than a refinement of everyday thinking.
‘Physics and Reality’, Franklin Institute Journal (Mar 1936). Collected in Out of My Later Years (1950), 59.
Science quotes on:  |  Clear (52)  |  Concept (102)  |  Contemplation (37)  |  Critical (34)  |  Everyday (13)  |  Foundation (75)  |  Justify (19)  |  Mind (544)  |  Philosopher (132)  |  Physicist (130)  |  Pinch (4)  |  Refinement (12)  |  Science (1699)  |  Shoe (8)  |  Surrender (13)  |  Thinking (222)

The physiological combustion theory takes as its starting point the fundamental principle that the amount of heat that arises from the combustion of a given substance is an invariable quantity–i.e., one independent of the circumstances accompanying the combustion–from which it is more specifically concluded that the chemical effect of the combustible materials undergoes no quantitative change even as a result of the vital process, or that the living organism, with all its mysteries and marvels, is not capable of generating heat out of nothing.
Bemerkungen über das mechanische Aequivalent der Wärme [Remarks on the Mechanical Equivalent of Heat] (1851), 17-9. Trans. Kenneth L. Caneva, Robert Mayer and the Conservation of Energy (1993), 240.
Science quotes on:  |  Accompany (18)  |  Change (291)  |  Circumstance (48)  |  Combustion (10)  |  Conclusion (120)  |  Fundamental (122)  |  Generation (111)  |  Heat (90)  |  Independent (41)  |  Life (917)  |  Marvel (24)  |  Mystery (125)  |  Organism (126)  |  Physiology (66)  |  Principle (228)  |  Process (201)  |  Quantitative (15)  |  Reaction (59)

The powerful notion of entropy, which comes from a very special branch of physics … is certainly useful in the study of communication and quite helpful when applied in the theory of language.
From 'The Growth of Science and the Structure of Culture', Daedalus (Winter 1958), 87, No. 1, 67.
Science quotes on:  |  Applied (15)  |  Branch (61)  |  Communication (58)  |  Entropy (40)  |  Helpful (10)  |  Language (155)  |  Notion (32)  |  Physics (301)  |  Powerful (51)  |  Special (51)  |  Study (331)  |  Useful (66)

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence that at a given instant comprehends all the relations of the entities of this universe, it could state the respective position, motions, and general affects of all these entities at any time in the past or future. Physical astronomy, the branch of knowledge that does the greatest honor to the human mind, gives us an idea, albeit imperfect, of what such an intelligence would be. The simplicity of the law by which the celestial bodies move, and the relations of their masses and distances, permit analysis to follow their motions up to a certain point; and in order to determine the state of the system of these great bodies in past or future centuries, it suffices for the mathematician that their position and their velocity be given by observation for any moment in time. Man owes that advantage to the power of the instrument he employs, and to the small number of relations that it embraces in its calculations. But ignorance of the different causes involved in the production of events, as well as their complexity, taken together with the imperfection of analysis, prevents our reaching the same certainty about the vast majority of phenomena. Thus there are things that are uncertain for us, things more or less probable, and we seek to compensate for the impossibility of knowing them by determining their different degrees of likelihood. So it was that we owe to the weakness of the human mind one of the most delicate and ingenious of mathematical theories, the science of chance or probability.