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Home > Dictionary of Science Quotations > Scientist Names Index T > John Tyndall Quotes > Truth

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John Tyndall
(2 Aug 1820 - 4 Dec 1893)

Irish physicist who demonstrated why the sky is blue. He wrote on diverse topics, including crystals, glaciers and radiation. His studies also included spontaneous generation, the germ theory of disease and ozone.



Charles Darwin, the Abraham of scientific men—a searcher as obedient to the command of truth as was the patriarch to the command of God.
— John Tyndall
In 'Science and Man', Fragments of Science (1879), Vol. 2, 370. Pesidential Address to the Birmingham and Midland Institute, 1877, in 'Science and Man', Fragments of Science for Unscientific People: A Series of Detached Essays, Addresses, and Reviews (1879), Vol. 2, 370.
Science quotes on:  |  Biography (247)  |  Command (58)  |  Charles Darwin (307)  |  God (759)  |  Men Of Science (143)  |  Obedience (20)  |  Obedient (9)  |  Patriarch (4)  |  Scientific (940)  |  Truth (1068)

The wintry clouds drop spangles on the mountains. If the thing occurred once in a century historians would chronicle and poets would sing of the event; but Nature, prodigal of beauty, rains down her hexagonal ice-stars year by year, forming layers yards in thickness. The summer sun thaws and partially consolidates the mass. Each winter's fall is covered by that of the ensuing one, and thus the snow layer of each year has to sustain an annually augmented weight. It is more and more compacted by the pressure, and ends by being converted into the ice of a true glacier, which stretches its frozen tongue far down beyond the limits of perpetual snow. The glaciers move, and through valleys they move like rivers.
— John Tyndall
The Glaciers of the Alps & Mountaineering in 1861 (1911), 247.
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To him [Faraday], as to all true philosophers, the main value of a fact was its position and suggestiveness in the general sequence of scientific truth.
— John Tyndall
Faraday as a Discoverer (1868), 84.
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To Nature nothing can be added; from Nature nothing can be taken away; the sum of her energies is constant, and the utmost man can do in the pursuit of physical truth, or in the applications of physical knowledge, is to shift the constituents of the never-varying total. The law of conservation rigidly excludes both creation and annihilation. Waves may change to ripples, and ripples to waves; magnitude may be substituted for number, and number for magnitude; asteroids may aggregate to suns, suns may resolve themselves into florae and faunae, and floras and faunas melt in air: the flux of power is eternally the same. It rolls in music through the ages, and all terrestrial energy—the manifestations of life as well as the display of phenomena—are but the modulations of its rhythm.
— John Tyndall
Conclusion of Heat Considered as a Mode of Motion: Being a Course of Twelve Lectures Delivered at the Royal Institution of Great Britain in the Season of 1862 (1863), 449.
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[Louis Rendu, Bishop of Annecy] collects observations, makes experiments, and tries to obtain numerical results; always taking care, however, so to state his premises and qualify his conclusions that nobody shall be led to ascribe to his numbers a greater accuracy than they merit. It is impossible to read his work, and not feel that he was a man of essentially truthful mind and that science missed an ornament when he was appropriated by the Church.
— John Tyndall
In The Glaciers of the Alps (1860), 299.
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[Regarding evolution believers:] Their business is not with the possible, but the actual—not with a world which might be, but with a world that is. This they explore with a courage not unmixed with reverence, and according to methods which, like the quality of a tree, are tested by their fruits. They have but one desire—to know the truth. They have but one fear—to believe a lie.
— John Tyndall
'Scientific Use of the Imagination', Discourse Delivered Before the British Association at Liverpool, (16 Sep 1870). Fragments of Science for Unscientific People: A Series of Detached Essays, Lectures, and Reviews (1892), Vol. 2, 134.
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See also:
  • 2 Aug - short biography, births, deaths and events on date of Tyndall's birth.
  • John Tyndall - context of quote “Fatal…to blink facts” - Medium image (500 x 250 px)
  • John Tyndall - context of quote “Fatal…to blink facts” - Large image (800 x 400 px)
  • John Tyndall - context of quote “The First Experiment a Child Makes” - Medium image (500 x 250 px)
  • John Tyndall - context of quote “The First Experiment a Child Makes” - Large image (800 x 400 px)
  • On Matter and Force - John Tyndall’s Lecture to general public at Dublin (1867).
  • A Vision of Modern Science: John Tyndall and the Role of the Scientist in Victorian Culture, by Ursula DeYoung. - 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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