let-me-tell-you-the-secret-that-has-led-me-to-my-goal-my-strength-lies-solely-in-my-tenacity
science-knows-no-country-because-knowledge-belongs-to-humanity-and-is-the-torch-which-illuminates-the-world
there-are-no-such-things-as-applied-sciences-only-applications-of-science
where-observation-is-concerned-chance-favors-only-the-prepared-mind
do-not-let-yourself-be-tainted-with-a-barren-skepticism
it-is-surmounting-difficulties-that-makes-heroes
When you believe you have found an important scientific fact, and are feverishly curious to publish it, constrain yourself for days, weeks, years sometimes, fight yourself, try and ruin your own experiments, and only proclaim your discovery after having exhausted all contrary hypotheses. But when, after so many efforts you have at last arrived at a certainty, your joy is one of the greatest which can be felt by a human soul.
Louis Pasteur
when-you-believe-you-have-found-important-scientific-fact-are-feverishly-curious-to-publish-it-constrain-yourself-for-days-weeks-years-sometimes-louis-pasteur
found quotesimportant quotesscientific quotesfact quotesfeverishly quotescurious quotespublish quotesconstrain quotesdays quotesweeks quotesyears quotesfight quotesruin quotesexperiments quotesproclaim quotesdiscovery quotesexhausted quotescontrary quoteshypotheses quotesefforts quotesarrived quotescertainty quotesjoy quotesgreatest quotesfelt quoteshuman quotessoul quotes
whatever-your-career-may-be-do-not-let-yourselves-become-tainted-by-deprecating-barren-scepticism-louis-pasteur
if-science-has-no-country-scientist-should-have-one-ascribe-to-it-influence-which-his-works-may-have-in-this-world-louis-pasteur
the-more-i-study-nature-more-i-stand-amazed-at-work-creator-louis-pasteur
 the needle move and take up a position quite different from the one assigned to it by terrestrial magnetism. A wire carrying an electric current deviates a magnetized needle from its position. That, gentlemen, was the birth of the modern telegraph.)
In that memorable year, 1822: Oersted, a Danish physicist, held in his hands a piece of copper wire, joined by its extremities to the two poles of a Volta pile. On his table was a magnetized needle on its pivot, and he suddenly saw (by chance you will say, but chance only favours the mind which is prepared) the needle move and take up a position quite different from the one assigned to it by terrestrial magnetism. A wire carrying an electric current deviates a magnetized needle from its position. That, gentlemen, was the birth of the modern telegraph.
Louis Pasteur
in-that-memorable-year-1822-oersted-danish-physicist-held-in-his-hands-piece-copper-wire-joined-by-its-extremities-to-two-poles-volta-pile-on-his-table-was-magnetized-needle-on-i
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in-fields-observation-chance-favors-only-prepared-mind-louis-pasteur
wine-is-most-healthful-most-hygienic-beverages-louis-pasteur
whether-our-efforts-are-not-favored-by-life-let-us-be-able-to-say-when-we-come-near-great-goal-i-have-done-what-i-could-louis-pasteur
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
great-problems-are-now-being-handled-keeping-every-thinking-man-in-suspense-unity-multiplicity-human-races-creation-man-1000-years-1000-louis-pasteur
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a-bottle-wine-contains-more-philosophy-than-all-books-in-world-louis-pasteur
, has finally exhausted all the possibilities of producing virulent or contagious diseases - which does not seem very likely.)
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
virulence-appears-in-new-light-which-cannot-but-be-alarming-to-humanity-unless-nature-in-her-evolution-down-ages-evolution-which-as-we-now-know-has-louis-pasteur
Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world.
Louis Pasteur
every-chemical-substance-whether-natural-artificial-falls-into-one-two-major-categories-according-to-spatial-characteristic-its-form-the-louis-pasteur
After death, life reappears in a different form and with different laws. It is inscribed in the laws of the permanence of life on the surface of the earth and everything that has been a plant and an animal will be destroyed and transformed into a gaseous, volatile and mineral substance.
Louis Pasteur
after-death-life-reappears-in-different-form-with-different-laws-it-is-inscribed-in-laws-permanence-life-on-surface-earth-everything-that-louis-pasteur
The universe is asymmetric and I am persuaded that life, as it is known to us, is a direct result of the asymmetry of the universe or of its indirect consequences. The universe is asymmetric. Acknowledging the role of molecules that have stereoisomers, some the mirror image of the others, and microorganisms whose chemistry prefers only one of those forms.
Louis Pasteur
the-universe-is-asymmetric-i-am-persuaded-that-life-as-it-is-known-to-us-is-direct-result-asymmetry-universe-its-indirect-consequences-the-louis-pasteur
universe quotesasymmetric quotespersuaded quoteslife quotesdirect quotesresult quotesasymmetry quotesindirect quotesconsequences quotesasymmetric quotesacknowledging quotesrole quotesmolecules quotesstereoisomers quotesmirror quotesimage quotesmicroorganisms quoteschemistry quotesprefers quotesforms quotes
I propose to provide proof... that just as always an alcoholic ferment, the yeast of beer, is found where sugar is converted into alcohol and carbonic acid, so always a special ferment, a lactic yeast, is found where sugar is transformed into lactic acid. And, furthermore, when any plastic nitrogenated substance is able to transform sugar into that acid, the reason is that it is a suitable nutrient for the growth of the [lactic] ferment.
Louis Pasteur
i-propose-to-provide-proof-that-just-as-always-alcoholic-ferment-yeast-beer-is-found-where-sugar-is-converted-into-alcohol-carbonic-acid-always-louis-pasteur
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did-you-ever-observe-to-whom-accidents-happen-chance-favors-only-prepared-mind-louis-pasteur
how-do-you-know-that-incessant-progress-science-will-not-compel-scientists-to-consider-that-life-has-existed-during-eternity-not-matter-louis-pasteur
whether-our-efforts-are-not-favored-by-life-let-us-be-able-to-say-when-we-come-near-to-great-goal-i-have-done-what-i-could-louis-pasteur
the-only-thing-that-can-bring-joy-is-work-louis-pasteur
Preconceived ideas are like searchlights which illumine the path of the experimenter and serve him as a guide to interrogate nature. They become a danger only if he transforms them into fixed ideas-this is why I should like to see these profound words inscribed on the threshold of all the temples of science: 'The greatest derangement of the mind is to believe in something because one wishes it to be so.'
Louis Pasteur
preconceived-ideas-are-like-searchlights-which-illumine-path-experimenter-serve-him-as-guide-to-interrogate-nature-they-become-danger-only-if-he-louis-pasteur
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outsidetheir-laboratories-thephysicianand-chemist-are-soldiers-without-arms-on-field-battle-louis-pasteur
these-are-living-springs-great-thoughts-great-actions-everything-grows-clear-in-reflections-from-infinite-louis-pasteur
the-role-infinitely-small-in-nature-is-infinitely-great-louis-pasteur
the-greatest-derangement-mind-is-to-believe-in-something-because-one-wishes-it-to-be-louis-pasteur
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
without-theory-practice-is-but-routine-born-habit-theory-alone-can-bring-forth-develop-spirit-invention-do-not-share-opinion-those-narrow-minds-louis-pasteur
theory quotespractice quotesroutine quotesborn quoteshabit quotestheory quotesbring quotesdevelop quotesspirit quotesinvention quotesshare quotesopinion quotesnarrow quotesminds quotesdisdain quotesscience quotesapplication quotestheoretical quotesdiscovery quotesmerit quotesexistence quotesawakens quoteshope quotescultivated quotesgrow quotes
one-must-not-assume-that-understanding-science-is-present-in-those-who-borrow-language-louis-pasteur
without-theory-practice-is-but-routine-born-habit-theory-alone-can-bring-forth-develop-spirit-inventions-louis-pasteur
the-greatest-malfunction-spirit-is-to-believe-things-louis-pasteur
live-in-serene-peace-laboratories-libraries-louis-pasteur
where-are-real-sources-human-dignity-freedom-modern-democracy-if-not-in-concept-infinity-to-which-all-men-are-equal-louis-pasteur
 grouped in the spirals of a right-hand helix or situated at the angles of an irregular tetrahedron, or arranged in such or such particular unsymmetrical fashion? We are unable to reply to these questions. But there can be no reason for doubting that the grouping of the atoms has an unsymmetrical arrangement with a non-superimposable image. It is not less certain that the atoms of the laevo-acid realize precisely an unsymmetrical arrangement of the inverse of the above.)
Are the atoms of the dextroacid (tartaric) grouped in the spirals of a right-hand helix or situated at the angles of an irregular tetrahedron, or arranged in such or such particular unsymmetrical fashion? We are unable to reply to these questions. But there can be no reason for doubting that the grouping of the atoms has an unsymmetrical arrangement with a non-superimposable image. It is not less certain that the atoms of the laevo-acid realize precisely an unsymmetrical arrangement of the inverse of the above.
Louis Pasteur
are-atoms-dextroacid-tartaric-grouped-in-spirals-righthand-helix-situated-at-angles-irregular-tetrahedron-arranged-in-such-such-particular-louis-pasteur
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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
the-universe-is-asymmetrical-entity-i-am-inclined-to-believe-that-life-as-it-is-manifested-to-us-must-be-function-asymmetry-universe-louis-pasteur
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if-you-suppress-laboratories-physical-science-will-be-stricken-with-barrenness-death-louis-pasteur
change-only-favours-minds-that-are-diligently-looking-preparing-for-discovery-louis-pasteur
to-know-how-to-wonder-question-is-first-step-mind-toward-discovery-louis-pasteur
when-i-approach-child-he-inspires-in-me-two-sentiments-tenderness-for-what-he-is-respect-for-what-he-may-become-louis-pasteur
in-realm-scientific-observation-luck-is-granted-only-to-those-who-are-prepared-louis-pasteur
There are two men in each one of us: the scientist, he who starts with a clear field and desires to rise to the knowledge of Nature through observations, experimentation and reasoning, and the man of sentiment, the man of belief, the man who mourns his dead children, and who cannot, alas, prove that he will see them again, but who believes that he will, and lives in the hope "" the man who will not die like a vibrio, but who feels that the force that is within him cannot die.
Louis Pasteur
there-are-two-men-in-each-one-us-scientist-he-who-starts-with-clear-field-desires-to-rise-to-knowledge-nature-through-observations-louis-pasteur
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never-will-doctrine-spontaneous-generation-recover-from-mortal-blow-struck-by-this-simple-experiment
