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Home > Dictionary of Science Quotations > Scientist Names Index S > Erwin Schrödinger Quotes

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Erwin Schrödinger
(12 Aug 1887 - 4 Jan 1961)

Austrian theoretical physicist who made early major contributions in the development of quantum theory.


Science Quotes by Erwin Schrödinger (58 quotes)

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[A]s you know, scientific education is fabulously neglected … This is an evil that is inherited, passed on from generation to generation. The majority of educated persons are not interested in science, and are not aware that scientific knowledge forms part of the idealistic background of human life. Many believe—in their complete ignorance of what science really is—that it has mainly the ancillary task of inventing new machinery, or helping to invent it, for improving our conditions of life. They are prepared to leave this task to the specialists, as they leave the repairing of their pipes to the plumber. If persons with this outlook decide upon the curriculum of our children, the result is necessarily such as I have just described it.
— Erwin Schrödinger
Opening remarks of the second of four public lectures for the Dublin Institute for Advanced Studies at University College, Dublin (Feb 1950), The Practical Achievements of Science Tending to Obliterate its True Import', collected in Science and Humanism: Physics in Our Time (1951). Reprinted in 'Nature and the Greeks' and 'Science and Humanism' (1996), 113.
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[Plato] was the first to envisage the idea of timeless existence and to emphasize it—against reason—as a reality, more [real] than our actual experience…
— Erwin Schrödinger
Quoted in Robert J. Scully, The Demon and the Quantum (2007), 3.
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~~[Misattributed]~~ … the task is … not so much to see what no one has yet seen; but to think what nobody has yet thought, about that which everybody sees.
— Erwin Schrödinger
This quote has been widely (apparently) incorrectly attributed to Erwin Schrödinger, for example, in Alan L. Mackay (ed.), A Dictionary of Scientific Quotations (1991), 219. For an earlier authentic statement of this quote, see the Arthur Schopenhauer Quotes page on this website. Also see Albert Szent-Gyorgyi.
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A mathematical truth is timeless, it does not come into being when we discover it. Yet its discovery is a very real event, it may be an emotion like a great gift from a fairy.
— Erwin Schrödinger
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Bohr’s standpoint, that a space-time description is impossible, I reject a limine. Physics does not consist only of atomic research, science does not consist only of physics, and life does not consist only of science. The aim of atomic research is to fit our empirical knowledge concerning it into our other thinking. All of this other thinking, so far as it concerns the outer world, is active in space and time. If it cannot be fitted into space and time, then it fails in its whole aim and one does not know what purpose it really serves.
— Erwin Schrödinger
Letter to Willy Wien (25 Aug 1926). Quoted in Walter Moore, Schrödinger: Life and Thought (1989), 226.
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Chromosomes … [contain] some kind of code-script the entire pattern of the individual’s future development and of its functioning in the mature state. Every complete set of chromosomes contains the full code.
— Erwin Schrödinger
In What is Life? : The Physical Aspect of the Living Cell (1944), 20.
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Consciousness is never experienced in the plural, only in the singular. Not only has none of us ever experienced more than one consciousness, but there is also no trace of circumstantial evidence of this ever happening anywhere in the world. If I say that there cannot be more than one consciousness in the same mind, this seems a blunt tautology–we are quite unable to imagine the contrary.
— Erwin Schrödinger
…...
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Einstein has not ... given the lie to Kant’s deep thoughts on the idealization of space and time; he has, on the contrary, made a large step towards its accomplishment.
— Erwin Schrödinger
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Every complete set of chromosomes contains the full code; so there are, as a rule, two copies of the latter in the fertilized egg cell, which forms the earliest stage of the future individual. In calling the structure of the chromosome fibres a code-script we mean that the all-penetrating mind, once conceived by Laplace, to which every causal connection lay immediately open, could tell from their structure whether the egg would develop, under suitable conditions, into a black cock or into a speckled hen, into a fly or a maize plant, a rhododendron, a beetle, a mouse or a woman. To which we may add, that the appearances of the egg cells are very often remarkably similar; and even when they are not, as in the case of the comparatively gigantic eggs of birds and reptiles, the difference is not so much in the relevant structures as in the nutritive material which in these cases is added for obvious reasons.
But the term code-script is, of course, too narrow. The chromosome structures are at the same time instrumental in bringing about the development they foreshadow. They are law-code and executive power?or, to use another simile, they are architect's plan and builder’s craft-in one.
— Erwin Schrödinger
In What is Life? : The Physical Aspect of the Living Cell (1944), 20-21.
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For thousands of years men have striven and suffered and begotten and woman have brought forth in pain. A hundred years ago, perhaps, another man sat on this spot; like you he gazed with awe and yearning in his heart at the dying light on the glaciers. Like you he was begotten of man and born of woman. He felt pain and brief joy as you do. Was he someone else? Was it not you yourself? What is this Self of yours? What was the necessary condition for making the thing conceived this time into you, just you and not someone else?
— Erwin Schrödinger
In Seek for the Road (1925). Quoted in Ken Wilber, Quantum Questions (1984), 96-97.
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From all we have learnt about the structure of living matter, we must be prepared to find it working in a manner that cannot be reduced to the ordinary laws of physics. And that not on the ground that there is any “new force” or what not, directing the behavior of the single atoms within a living organism, but because the construction is different from anything we have yet tested in the physical laboratory.
— Erwin Schrödinger
What is Life? (1956), 74.
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How would we express in terms of the statistical theory the marvellous faculty of a living organism, by which it delays the decay into thermodynamical equilibrium (death)? … It feeds upon negative entropy … Thus the device by which an organism maintains itself stationary at a fairly high level of orderliness (= fairly low level of entropy) really consists in continually sucking orderliness from its environment.
— Erwin Schrödinger
In 'Organization Maintained by Extracting “Order” from the Environment', What is Life? : The Physical Aspect of the Living Cell (1944), 74.
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I am born into an environment–I know not whence I came nor whither I go nor who I am. This is my situation as yours, every single one of you. The fact that everyone always was in this same situation, and always will be, tells me nothing. Our burning question as to the whence and whither–all we can ourselves observe about it is the present environment. That is why we are eager to find out about it as much as we can. That is science, learning, knowledge; it is the true source of every spiritual endeavour of man. We try to find out as much as we can about the spatial and temporal surroundings of the place in which we find ourselves put by birth.
— Erwin Schrödinger
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I am very astonished that the scientific picture of the real world around me is deficient. It gives a lot of factual information, puts all our experience in a magnificently consistent order, but it is ghastly silent about all and sundry that is really near to our heart, that really matters to us. It cannot tell us a word about red and blue, bitter and sweet, physical pain and physical delight; it knows nothing of beautiful and ugly, good or bad, God and eternity. Science sometimes pretends to answer questions in these domains, but the answers are very often so silly that we are not inclined to take them seriously.
— Erwin Schrödinger
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I belong to those theoreticians who know by direct observation what it means to make a measurement. Methinks it were better if there were more of them.
— Erwin Schrödinger
Referring to his laboratory experience during his assistantship in experimental physics, as quoted in Walter Moore, Schrödinger: Life and Thought (1989, 1998), 58-59. Moore describes that Schrödinger in his early days in the laboratory, “learned to believe that physics is not based upon mathematical fantasies but on a solid ground of experimental observations.”
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I consider it extremely doubtful whether the happiness of the human race has been enhanced by the technical and industrial developments that followed in the wake of rapidly progressing natural science.
— Erwin Schrödinger
…...
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I don't like it, and I'm sorry I ever had anything to do with it. [About the probability interpretation of quantum mechanics.]
— Erwin Schrödinger
Epigraph, without citation, in John Gribbin, In Search of Schrödinger’s Cat: Quantum Physics and Reality (1984), v, frontispiece.
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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.
— Erwin Schrödinger
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.
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If one has left this entire system to itself for an hour, one would say that the cat still lives if meanwhile no atom has decayed. The psi-function of the entire system would express this by having in it the living and dead cat (pardon the expression) mixed or smeared out in equal parts.
— Erwin Schrödinger
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If we were bees, ants, or Lacedaemonian warriors, to whom personal fear does not exist and cowardice is the most shameful thing in the world, warring would go on forever. But luckily we are only men—and cowards.
— Erwin Schrödinger
In first Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'The Physical Basis of Consciousness', printed in Mind and Matter (1958), 14. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012), 102.
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If you cannot—in the long run—tell everyone what you have been doing, your doing has been worthless.
— Erwin Schrödinger
Concluding remark of the first of four public lectures for the Dublin Institute for Advanced Studies at University College, Dublin (Feb 1950), 'The Spiritual Bearing of Science on Life', collected in Science and Humanism: Physics in Our Time (1951). Reprinted in 'Nature and the Greeks' and 'Science and Humanism' (1996), 112.
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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.
— Erwin Schrödinger
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In particular, and most importantly, this is the reason why the scientific worldview contains of itself no ethical values, no esthetical values, not a word about our own ultimate scope or destination, and no God, if you please. Whence came I and whither go I?
— Erwin Schrödinger
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In physics we have dealt hitherto only with periodic crystals. To a humble physicist’s mind, these are very interesting and complicated objects; they constitute one of the most fascinating and complex material structures by which inanimate nature puzzles his wits. Yet, compared with the aperiodic crystal, they are rather plain and dull. The difference in structure is of the same kind as that between an ordinary wallpaper in which the same pattern is repeated again and again in regular periodicity and a masterpiece of embroidery, say a Raphael tapestry, which shows no dull repetition, but an elaborate, coherent, meaningful design traced by the great master.
— Erwin Schrödinger
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In this communication I wish first to show in the simplest case of the hydrogen atom (nonrelativistic and undistorted) that the usual rates for quantization can be replaced by another requirement, in which mention of “whole numbers” no longer occurs. Instead the integers occur in the same natural way as the integers specifying the number of nodes in a vibrating string. The new conception can be generalized, and I believe it touches the deepest meaning of the quantum rules.
— Erwin Schrödinger
'Quantisierung als Eigenwertproblem', Annalen der Physik (1926), 79, 361. Trans. Walter Moore, Schrödinger: Life and Thought (1989), 200-2.
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It seems plain and self-evident, yet it needs to be said: the isolated knowledge obtained by a group of specialists in a narrow field has in itself no value whatsoever, but only in its synthesis with all the rest of knowledge and only inasmuch as it really contributes in this synthesis toward answering the demand, ‘Who are we?’
— Erwin Schrödinger
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Knowledge, feeling, and choice are essentially eternal and unchangeable and numerically one in all men, nay in all sensitive beings.
— Erwin Schrödinger
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Matter and energy seem granular in structure, and so does “life”, but not so mind.
— Erwin Schrödinger
In Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'The Arithmetical Paradox: The Oneness of Mind', printed in Mind and Matter (1958), 61. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012), 134.
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Multiplicity is only apparent, in truth, there is only one mind.
— Erwin Schrödinger
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Nature has no reverence towards life. Nature treats life as though it were the most valueless thing in the world. … Nature does not act by purposes.
— Erwin Schrödinger
In Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'The Arithmetical Paradox: The Oneness of Mind', printed in Mind and Matter (1958), 66. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012), 138.
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Nirvana is a state of pure blissful knowledge ... It has nothing to do with the individual. The ego or its separation is an illusion. Indeed in a certain sense two ‘I’s are identical namely when one disregards all special contents–their Karma. The goal of man is to preserve his Karma and to develop it further ... when man dies his Karma lives and creates for itself another carrier.
— Erwin Schrödinger
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No self is of itself alone. It has a long chain of intellectual ancestors. The ‘I’ is chained to ancestry by many factors ... This is not mere allegory, but an eternal memory.
— Erwin Schrödinger
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On principle, there is nothing new in the postulate that in the end exact science should aim at nothing more than the description of what can really be observed. The question is only whether from now on we shall have to refrain from tying description to a clear hypothesis about the real nature of the world. There are many who wish to pronounce such abdication even today. But I believe that this means making things a little too easy for oneself.
— Erwin Schrödinger
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Our mind, by virtue of a certain finite, limited capability, is by no means capable of putting a question to Nature that permits a continuous series of answers. The observations, the individual results of measurements, are the answers of Nature to our discontinuous questioning.
— Erwin Schrödinger
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Science cannot tell us a word about why music delights us, of why and how an old song can move us to tears.
— Erwin Schrödinger
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Science is a game—but a game with reality, a game with sharpened knives … If a man cuts a picture carefully into 1000 pieces, you solve the puzzle when you reassemble the pieces into a picture; in the success or failure, both your intelligences compete. In the presentation of a scientific problem, the other player is the good Lord. He has not only set the problem but also has devised the rules of the game—but they are not completely known, half of them are left for you to discover or to deduce. The experiment is the tempered blade which you wield with success against the spirits of darkness—or which defeats you shamefully. The uncertainty is how many of the rules God himself has permanently ordained, and how many apparently are caused by your own mental inertia, while the solution generally becomes possible only through freedom from its limitations.
— Erwin Schrödinger
Quoted in Walter Moore, Schrödinger: Life and Thought (1989), 348.
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The great revelation of the quantum theory was that features of discreteness were discovered in the Book of Nature, in a context in which anything other than continuity seemed to be absurd according to the views held until then.
— Erwin Schrödinger
What is Life? (1944), 48.
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The great thing [about Kant’s philosophy] was to form the idea that this one thing—mind or world—may well be capable of other forms of appearance that we cannot grasp and that do not imply the notions of space and time. This means an imposing liberation from our inveterate prejudice.
— Erwin Schrödinger
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The ingenious but nevertheless somewhat artificial assumptions of [Bohr’s model of the atom], … are replaced by a much more natural assumption in de Broglie’s wave phenomena. The wave phenomenon forms the real “body” of the atom. It replaces the individual punctiform electrons, which in Bohr’s model swarm around the nucleus.
— Erwin Schrödinger
From 'Our Image of Matter', collected in Werner Heisenberg, Max Born, Erwin Schrödinger, Pierre Auger, On Modern Physics (1961), 50. Webmaster note: “punctiform” means composed of points.
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The laws of physics and chemistry are statistical throughout.
— Erwin Schrödinger
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The material world has only been constructed at the price of taking the self, that is, mind, out of it, removing it; mind is not part of it.
— Erwin Schrödinger
In Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'The Principle of Objectivation', printed in Mind and Matter (1958), 39. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012), 119.
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The multiplicity is only apparent. This is the doctrine of the Upanishads. And not of the Upanishads only. The mystical experience of the union with God regularly leads to this view, unless strong prejudices stand in the West.
— Erwin Schrödinger
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The observer is never entirely replaced by instruments; for if he were, he could obviously obtain no knowledge whatsoever ... They must be read! The observer’s senses have to step in eventuality. The most careful record, when not inspected, tells us nothing.
— Erwin Schrödinger
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The observing mind is not a physical system, it cannot interact with any physical system. And it might be better to reserve the term ‘subject ‘ for the observing mind ... For the subject, if anything, is the thing that senses and thinks. Sensations and thoughts do not belong to the ‘world of energy.’
— Erwin Schrödinger
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The plurality that we perceive is only an appearance; it is not real.
— Erwin Schrödinger
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The scientific world-picture vouchsafes a very complete understanding of all that happens–it makes it just a little too understandable. It allows you to imagine the total display as that of a mechanical clockwork which, for all that science knows, could go on just the same as it does, without there being consciousness, will, endeavor, pain and delight and responsibility connected with it–though they actually are. And the reason for this disconcerting situation is just this: that for the purpose of constructing the picture of the external world, we have used the greatly simplifying device of cutting our own personality out, removing it; hence it is gone, it has evaporated, it is ostensibly not needed.
— Erwin Schrödinger
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The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.
— Erwin Schrödinger
In Lecture, 'The Principle of Objectivation', the Tarner Lectures Delivered at Trinity College, Cambridge (Oct 1956), published in Mind and Matter (1958), 37.
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The sensation of colour cannot be accounted for by the physicist's objective picture of light-waves.
— Erwin Schrödinger
In Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'Science and Religion', printed in Mind and Matter (1958), 90. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012), 154.
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The world is a construct of our sensations, perceptions, memories. It is convenient to regard it as existing objectively on its own. But it certainly does not become manifest by its mere existence.
— Erwin Schrödinger
Opening remark in first Tarner Lecture, at Trinity College, Cambridge (Oct 1956), 'The Physical Basis of Consciousness', printed in Mind and Matter (1958), 1. Also collected in What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2012).
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The world is given to me only once, not one existing and one perceived. Subject and object are only one. The barrier between them cannot be said to have broken down as a result of recent experience in the physical sciences, for this barrier does not exist.
— Erwin Schrödinger
Concluding remark in Lecture, 'The Principle of Objectivation', the Tarner Lectures Delivered at Trinity College, Cambridge (Oct 1956), published in Mind and Matter (1958). Reprinted in collection What is Life?: With Mind and Matter and Autobiographical Sketches (1992, 2006), 127
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There is obviously only one alternative, namely the unification of minds or consciousnesses. Their multiplicity is only apparent, in truth there is only one mind.
— Erwin Schrödinger
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Thus you can throw yourself flat on the ground, stretched out upon Mother Earth, with certain conviction that you are one with her and she with you ... For eternally and always there is only now, one and the same now; the present is the only thing that has no end.
— Erwin Schrödinger
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We do not belong to this material world that science constructs for us. We are not in it; we are outside. We are only spectators. The reason why we believe that we are in it, that we belong to the picture, is that our bodies are in the picture. Our bodies belong to it. Not only my own body, but those of my friends, also of my dog and cat and horse, and of all the other people and animals. And this is my only means of communicating with them.
— Erwin Schrödinger
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We have just introduced the term gene for the hypothetical material carrier of a definite hereditary feature.
— Erwin Schrödinger
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Who are we? The answer to this question is not only one of the tasks but the task of science.
— Erwin Schrödinger
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Why are atoms so small? ... Many examples have been devised to bring this fact home to an audience, none of them more impressive than the one used by Lord Kelvin: Suppose that you could mark the molecules in a glass of water, then pour the contents of the glass into the ocean and stir the latter thoroughly so as to distribute the marked molecules uniformly throughout the seven seas; if you then took a glass of water anywhere out of the ocean, you would find in it about a hundred of your marked molecules.
— Erwin Schrödinger
What is life?: the Physical Aspect of the Living Cell (1944). Collected in What is Life? with Mind And Matter & Autobiographical Sketches (1967, 1992), 6-7.
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Why must our bodies be so large compared with the atom?
— Erwin Schrödinger
What is Life? In Marc J. Madou, Fundamentals of Microfabrication: the Science of Miniaturization (2nd ed., 2002), 1.
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Would it (the world) otherwise (without consciousness) have remained a play before empty benches, not existing for anybody, thus quite properly not existing?
— Erwin Schrödinger
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Quotes by others about Erwin Schrödinger (10)

Arthur Stanley Eddington quote: The electron, as it leaves the atom, crystallises out of Schrödinger’s mist like a genie emergin
The electron, as it leaves the atom, crystallises out of Schrödinger’s mist like a genie emerging from his bottle.
Gifford Lectures (1927), The Nature of the Physical World (1928), 199.
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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.
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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.
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In 1944 Erwin Schroedinger, stimulated intellectually by Max Delbruck, published a little book called What is life? It was an inspiration to the first of the molecular biologists, and has been, along with Delbruck himself, credited for directing the research during the next decade that solved the mystery of how 'like begat like.' Max was awarded this Prize in 1969, and rejoicing in it, he also lamented that the work for which he was honored before all the peoples of the world was not something which he felt he could share with more than a handful. Samuel Beckett's contributions to literature, being honored at the same time, seemed to Max somehow universally accessible to anyone. But not his. In his lecture here Max imagined his imprisonment in an ivory tower of science.
'The Polymerase Chain Reaction', Nobel Lecture (8 Dec 1993). In Nobel Lectures: Chemistry 1991-1995 (1997), 103.
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When [Erwin Schrödinger] went to the Solvay conferences in Brussels, he would walk from the station to the hotel where the delegates stayed, carrying all his luggage in a rucksack and looking so like a tramp that it needed a great deal of argument at the reception desk before he could claim a room.
Quoted in Robert L. Weber, Pioneers of Science: Nobel Prize Winners in Physics (1980), 100.
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His [Erwin Schrödinger's] private life seemed strange to bourgeois people like ourselves. But all this does not matter. He was a most lovable person, independent, amusing, temperamental, kind and generous, and he had a most perfect and efficient brain.
Max Born
In My Life, Recollections of a Nobel Laureate (1978), 270. Quoted by Walter Moore, Schrödinger: Life and Thought (1992), 6.
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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.”
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It is, as Schrödinger has remarked, a miracle that in spite of the baffling complexity of the world, certain regularities in the events could be discovered. One such regularity, discovered by Galileo, is that two rocks, dropped at the same time from the same height, reach the ground at the same time. The laws of nature are concerned with such regularities.
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.
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When silhouetted against historical background Maxwell’s electromagnetic theory and its remarkable experimental confirmation by Hertz loomed up as large to the physicist of 1895 as the de Broglie-Schrödinger wave theory of matter and its experimental confirmation by Davison and Germer does to the physicist of to-day. [1931]
In 'The Romance of the Next Decimal Place', Science (1 Jan 1932), 75, No. 1931, 2.
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When Hitler arrived in 1933, the tradition of scholarship in Germany was destroyed, almost overnight. … Europe was no longer hospitable to the imagination—and not just the scientific imagination. A whole conception of culture was in retreat…. Silence fell, as after the trial of Galileo. The great men went out into a threatened world. Max Born. Erwin Schrödinger. Albert Einstein. Sigmund Freud. Thomas Mann. Bertolt Brecht. Arturo Toscanini. Bruno Walter. Marc Chagall. Enrico Fermi. Leo Szilard….
In Ch. 11, 'Knowledge or Certainty', The Ascent of Man, (1973), 367.
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See also:
  • 12 Aug - short biography, births, deaths and events on date of Schrödinger's birth.
  • Schrödinger: Life and Thought, by Walter J. Moore. - book suggestion.

Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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