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Claude Bernard Biography

Claude Bernard (French: [bɛʁnaʁ]; 12 July 1813 – 10 February 1878) was a French physiologist. Historian I. Bernard Cohen of Harvard University called Bernard "one of the greatest of all men of science". Among many other accomplishments, he was one of the first to suggest the use of blind experiments to ensure the objectivity of scientific observations. He originated the term milieu intérieur, and the associated concept of homeostasis (the latter term being coined by Walter Bradford Cannon).

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Claude Bernard Quotes

Priestley [said] that each discovery we make shows us many others that should be made.

Discovery, Made, Make, Priestley, Science

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.

Endlessly, Facts, Grasp, Investigators, Knowledge, Torment

A discovery is generally an unforeseen relation not included in theory.

Discovery, Generally, Relation, Science, Theory

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.

Advance, Climbing, Horizon, Science, Theories, Widens

The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from which the virtues most valuable to investigators in physiology and medicine are derived.

Freedom, Initiative, Medicine, Mind, Science

The experimenter who does not know what he is looking for will not understand what he finds.

Science, Doe, Knows, Know, Looking, Experimenter

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.

Fact, Giving Up, Hastened, Principles, Researches, Science

A contemporary poet has characterized this sense of the personality of art and of the impersonality of science in these words,-'Art is myself; science is ourselves. '

Art, Contemporary, Impersonality, Personality, Science

Man does not limit himself to seeing; he thinks and insists on learning the meaning of phenomena whose existence has been revealed to him by observation. So he reasons, compares facts, puts questions to them, and by the answers which he extracts, tests one by another. This sort of control, by means of reasoning and facts, is what constitutes experiment, properly speaking; and it is the only process that we have for teaching ourselves about the nature of things outside us.

Learning, Mean, Observation, Process, Science, Teaching

The true worth of an experimenter consists in his pursuing not only what he seeks in his experiment, but also what he did not seek.

Experiments, Pursuing, Seeks, True Worth, Truth, Worth

Men who have excessive faith in their theories. . . make poor observations, because they choose among the results of their experiments only what suits their object, neglecting whatever is unrelated to it and carefully setting aside everything which might tend toward the idea they wish to combat

Ideas, Men, Neglecting, Poor, Science, Suits

The joy of discovery is certainly the liveliest that the mind of man can ever feel.

Discovery, Liveliest, Men, Mind, Science

We must never make experiments to confirm our ideas, but simply to control them.

Confirm, Experiments, Ideas, Make, Science

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.

Experimental, Life, Mean, Medical, Science, Scientific

Art is 'I'; science is 'we'.

Art, Science, Witty

True science teaches us to doubt and, in ignorance, to refrain.

Doubt, Ignorance, Refrain, Science, Teaches, True

The first entirely vital action, so termed because it is not effected outside the influence of life, consists in the creation of the glycogenic material in the living hepatic tissue. The second entirely chemical action, which can be effected outside the influence of life, consists in the transformation of the glycogenic material into sugar by means of a ferment.

Glycogenic, Hepatic, Material, Mean, Sugar, Tissues

In the philosophic sense, observation shows and experiment teaches.

Observation, Philosophic, Science, Sense, Shows, Teach

In every enterprise. . . the mind is always reasoning, and, even when we seem to act without a motive, an instinctive logic still directs the mind. Only we are not aware of it, because we begin by reasoning before we know or say that we are reasoning, just as we begin by speaking before we observe that we are speaking, and just as we begin by seeing and hearing before we know what we see or what we hear.

Directs, Hear, Hearing, Mind, Science, See

Science rejects the indeterminate.

Indeterminate, Rejects, Science

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