Louis Pasteur Quotes - Page 4

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• Imagination should give wings to our thoughts but we always need decisive experimental proof, and when the moment comes to draw conclusions and to interpret the gathered observations, imagination must be checked and documented by the factual results of the experiment.

  Louis Pasteur

  Wings, Giving, Imagination

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• Science proceeds by successive answers to questions more and more subtle, coming nearer and nearer to the very essence of phenomena.

  Louis Pasteur

  Essence, Answers, Subtle

  Etudes sur le biere Ch. VI, Sect. vi (transl. Rene J. Dubos)

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• In the fields of observation chance favors only those minds which are prepared.

  Louis Pasteur

  Past, Mind, Favors

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• In good philosophy, the word cause ought to be reserved to the single Divine impulse that has formed the universe.

  Louis Pasteur

  Philosophy, Atheism, Causes

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• Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.

  Louis Pasteur

  Past, Mind, Favors

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• Great problems are now being handled, keeping every thinking man in suspense; the unity or multiplicity of human races; the creation of man 1,000 years or 1,000 centuries ago; the fixity of species, or the slow and progressive transformation of one species into another; the eternity of matter; the idea of a God unnecessary: such are some of the questions that humanity discusses nowadays.

  Louis Pasteur

  Men, Thinking, Ideas

  Address at the "Sorbonne Scientific Soirée" on April 07, 1864. "The Life of Pasteur". Book by René Vallery-Radot, translated by R .L. Devonshire, p. 140, archive.org. 1902.

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• Virulence appears in a new light which cannot but be alarming to humanity; unless nature, in her evolution down the ages (an evolution which, as we now know, has been going on for millions, nay, hundreds of millions of years), has finally exhausted all the possibilities of producing virulent or contagious diseases - which does not seem very likely.

  Louis Pasteur

  Light, Years, Humanity

  "Louis Pasteur: The man and his theories" by Hilaire Cuny, translated by P. Evans. London: The Scientific Book Club, 1965.

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• Analogy cannot serve as proof.

  Louis Pasteur

  Analogies, Proof

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• If perchance you should falter during the journey, a hand would be there to support you. If that should be wanting, God, who alone could take that hand from you, would Himself accomplish its work.

  Louis Pasteur

  Journey, Hands, Support You

  "The Life of Pasteur". Book by René Vallery-Radot, translated by R .L. Devonshire, p. 19, archive.org. 1902.

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• To demonstrate experimentally that a microscopic organism actually is the cause of a disease and the agent of contagion, I know no other way, in the present state of Science, than to subject the microbe (the new and happy term introduced by M. Sédillot) to the method of cultivation out of the body.

  Louis Pasteur

  Knowledge, Science, Agents

  Hippocrates, Ambroise Paré, William Harvey, Edward Jenner, Oliver Wendell Holmes (1910). “Scientific Papers; Physiology, Medicine, Surgery, Geology”

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• How do you know that the incessant progress of science will not compel scientists to consider that life has existed during eternity, and not matter?

  Louis Pasteur

  Progress, Matter, Eternity

  Partially quoted in "Louis Pasteur: Free Lance of Science" by René Dubos, Da Capo Press, Inc., (p. 396), 1950.

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• If science has no country, the scientist should have one, and ascribe to it the influence which his works may have in this world.

  Louis Pasteur

  Country, Hard Work, Science

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• If you suppress laboratories, physical science will be stricken with barrenness and death.

  Louis Pasteur

  Laboratory, Physical Science, Ifs

  Some Reflections on Science in France Pt 1

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• ... by chance you will say, but chance only favors the mind which is prepared.

  Louis Pasteur

  Mind, Electric Current, Favors

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• Work usually follows will.

  Louis Pasteur

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• I am on the edge of mysteries and the veil is getting thinner and thinner.

  Louis Pasteur

  Veils, Mystery, Edges

  Letter in December 1851. "The Great Influenza: The Epic Story of the Deadliest Plague In History" by John M. Barry, 2004.

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• There does not exist a category of science to which one can give the name applied science. There are sciences and the applications of science, bound together as the fruit of the tree which bears it.

  Louis Pasteur

  Science, Past, Names

  "Revue Scientifique". Book by Louis Pasteur, 1871.

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• Outsidetheir laboratories, thephysicianand chemist are soldiers without arms on the field of battle.

  Louis Pasteur

  Soldier, Battle, Arms

  Some Reflections on Science in France, pt.1.

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• Nothing is lost and nothing is created in the operations of art as those of nature.

  Louis Pasteur

  Art, Nature, Science

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• Science belongs to no one country.

  Louis Pasteur

  Inspirational, Country, Science

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• Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of invention. ... [Do not] share the opinion of those narrow minds who disdain everything in science which has not an immediate application. ... A theoretical discovery has but the merit of its existence: it awakens hope, and that is all. But let it be cultivated, let it grow, and you will see what it will become.

  Louis Pasteur

  Science, Discovery, Practice

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• There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

  Louis Pasteur

  Science, Tree, Special

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• The universe is an asymmetrical entity. I am inclined to believe that life as it is manifested to us must be a function of the asymmetry of the universe or of the consequence of this fact. The universe is asymmetrical; for if one placed the entire set of bodies that compose the solar system, each moving in its own way, before a mirror, the image shown would not be superimposable on the reality.

  Louis Pasteur

  Life, Believe, Moving

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• The nights seem to me too long... I am often scolded by Madame Pasteur, but I tell her I shall lead her to fame.

  Louis Pasteur

  Night, Long, Fame

  "Microbe Hunters". Book by Paul De Kruif, 1926.

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• As in the experimental sciences, truth cannot be distinguished from error as long as firm principles have not been established through the rigorous observation of facts.

  Louis Pasteur

  Science, Errors, Long

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