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Il ne fallait jamais faire des expériences pour confirmer ses idées, mais simplement pour les contrôler. We must never make experiments to confirm our ideas, but simply to control them.

Claude Bernard

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Claude Bernard
Age: 64 †
Born: 1813
Born: July 12
Died: 1878
Died: February 10
Physician Writer
Physiologist
Politician
Professor
Psychologist
Never
Confirm
Pour
Experiments
Simply
Control
Ideas
Must
Mais
Make
Faire

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Put off your imagination, as you put off your overcoat, when you enter the laboratory. Put it on again, as you put on your overcoat, when you leave.
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True science teaches us to doubt and, in ignorance, to refrain.
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The science of life is a superb and dazzlingly lighted hall which may be reached only by passing through a long and ghastly kitchen.
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In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes, like the objective reality of things, will be hidden from him forever and that he can only know relations.
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A discovery is generally an unforeseen relation not included in theory.
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The experimenter who does not know what he is looking for will not understand what he finds.
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Science rejects the indeterminate.
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Those who do not know the torment of the unknown cannot have the joy of discovery.
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The fact that knowledge endlessly recedes as the investigator is about to grasp it is what constitutes at the same time his torment and happiness.
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Theories are like a stairway by climbing, science widens its horizon more and more, because theories embody and necessarily include proportionately more facts as they advance.
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The mental never influences the physical. It is always the physical that modifies the mental, and when we think that the mind is diseased, it is always an illusion.
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Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these despisers of their fellows ... make experiments only to destroy a theory, instead of to seek the truth.
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Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on a larger number of facts. ... Theories are only hypotheses, verified by more or less numerous facts. Those verified by the most facts are the best, but even then they are never final, never to be absolutely believed.
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First causes are outside the realm of science.
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Proof that a given condition always precedes or accompanies a phenomenon does not warrant concluding with certainty that a given condition is the immediate cause of that phenomenon. It must still be established that when this condition is removed, the phenomen will no longer appear.
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Science admits no exceptions otherwise there would be no determinism in science, or rather, there would be no science.
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A great discovery is a fact whose appearance in science gives rise to shining ideas, whose light dispels many obscurities and shows us new paths.
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The doubter is a true man of science: he doubts only himself and his interpretations, but he believes in science.
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Well-observed facts, though brought to light by passing theories, will never die they are the material on which alone the house of science will at last be built.
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The joy of discovery is certainly the liveliest that the mind of man can ever feel.
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