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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.

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
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Imagination
Science
Overcoat
Laboratory
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More quotes by Claude Bernard

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Our ideas are only intellectual instruments which we use to break into phenomena we must change them when they have served their purpose, as we change a blunt lancet that we have used long enough.
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In a word, I consider hospitals only as the entrance to scientific medicine they are the first field of observation which a physician enters but the true sanctuary of medical science is a laboratory only there can he seek explanations of life in the normal and pathological states by means of experimental analysis.
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Science rejects the indeterminate.
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A discovery is generally an unforeseen relation not included in theory.
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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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First causes are outside the realm of science.
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In the philosophic sense, observation shows and experiment teaches.
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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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We achieve more than we know. We know more than we understand. We understand more than we can explain.
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Obervation is a passive science, experimentation is an active science.
Claude Bernard
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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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If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic which, in my opinion, sharply differentiates biological science. I should say: life is creation.
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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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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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We must alter theory to adapt it to nature, but not nature to adapt it to theory.
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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.
Claude Bernard
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The joy of discovery is certainly the liveliest that the mind of man can ever feel.
Claude Bernard
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True science teaches us to doubt and, in ignorance, to refrain.
Claude Bernard
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Those who do not know the torment of the unknown cannot have the joy of discovery.
Claude Bernard
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Science increases our power in proportion as it lowers our pride.
Claude Bernard