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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.

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
Causes
Phenomenon
Accompanies
Science
Certainty
Warrant
Given
Appear
Precedes
Stills
Condition
Warrants
Doe
Proof
Accompany
Still
Conditions
Removed
Must
Cause
Immediate
Always
Longer
Established
Concluding

More quotes by Claude Bernard

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We achieve more than we know. We know more than we understand. We understand more than we can explain.
Claude Bernard
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Science admits no exceptions otherwise there would be no determinism in science, or rather, there would be no science.
Claude Bernard
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Science does not permit exceptions.
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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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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.
Claude Bernard
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The goal of scientific physicians in their own science ... is to reduce the indeterminate. Statistics therefore apply only to cases in which the cause of the facts observed is still indeterminate.
Claude Bernard
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In these researches I followed the principles of the experimental method that we have established, i.e., that, in presence of a well-noted, new fact which contradicts a theory, instead of keeping the theory and abandoning the fact, I should keep and study the fact, and I hastened to give up the theory.
Claude Bernard
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The eloquence of a scientist is clarity scientific truth is always more luminous when its beauty is unadorned than when it is tricked out in the embellishments with which our imagination would seek to clothe it.
Claude Bernard
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Mediocre men often have the most acquired knowledge. It is in the darker. It is in the darker regions of science that great men are recognized they are marked by ideas which light up phenomena hitherto obscure and carry science forward.
Claude Bernard
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First causes are outside the realm of science.
Claude Bernard
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We must alter theory to adapt it to nature, but not nature to adapt it to theory.
Claude Bernard
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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 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.
Claude Bernard
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True science teaches us to doubt and, in ignorance, to refrain.
Claude Bernard
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Obervation is a passive science, experimentation is an active science.
Claude Bernard
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Priestley [said] that each discovery we make shows us many others that should be made.
Claude Bernard
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A discovery is generally an unforeseen relation not included in theory.
Claude Bernard
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The experimenter who does not know what he is looking for will not understand what he finds.
Claude Bernard
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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.
Claude Bernard
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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.
Claude Bernard