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My opinion - nay more, my conviction - is that, in the present state of science, as you rightly say, spontaneous generation is a chimera and it would be impossible for you to contradict me, for my experiments all stand forth to prove that spontaneous generation is a chimera.

Louis Pasteur

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Louis Pasteur
Age: 72 †
Born: 1822
Born: December 27
Died: 1895
Died: September 28
Agronomist
Biochemist
Biologist
Chemist
Microbiologist
Naturalist
University Teacher
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Science
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More quotes by Louis Pasteur

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No, there is now no circumstance known in which it can be affirmed that microscopic beings came into the world without germs, without parents similar to themselves. Those who affirm it have been duped by illusions, by ill-conducted experiments, spoilt by errors that they either did not perceive or did not know how to avoid.
Louis Pasteur
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Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.
Louis Pasteur
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The artificial products do not have any molecular dissymmetry and I could not indicate the existence of a more profound separation between the products born under the influence of life and all the others.
Louis Pasteur
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What did you do today to receive your instruction?
Louis Pasteur
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Science brings men nearer to God.
Louis Pasteur
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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
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Chance favours the trained mind.
Louis Pasteur
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Do not promote what you can't explain, simplify, and prove early.
Louis Pasteur
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The greatest disorder of the mind is to let will direct it.
Louis Pasteur
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Worship the spirit of criticism.
Louis Pasteur
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Since the most ancient times, all men, and particularly those who endeavored in the practice of medicine, have brought closer together two natural phenomena of capital importance: illness or fever and fermentation.
Louis Pasteur
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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
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Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.
Louis Pasteur
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When I approach a child, he inspires in me two sentiments tenderness for what he is, and respect for what he may become.
Louis Pasteur
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When one works and imagines and dreams of nothing else than the search for answers that God has posed, it is difficult to be so still.
Louis Pasteur
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The more I know, the more nearly is my faith that of the Breton peasant. Could I but know all I would have the faith of a Breton peasant woman.
Louis Pasteur
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My strength lies solely in my tenacity.
Louis Pasteur
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One does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.
Louis Pasteur
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These three things-work, will, success-fill human existences. Will opens the door to success, both brilliant and happy. Work passes these doors, and at the end of the journey success comes in to crown one's efforts.
Louis Pasteur
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Posterity will one day laugh at the sublime foolishness of the modern materialistic philosophy. The more I study nature, the more I stand amazed at the work of the Creator. I pray while I am engaged at my work in the laboratory.
Louis Pasteur