Man can learn nothing unless he proceeds from the known to the unknown.
CLAUDE BERNARDScience does not permit exceptions.
More Claude Bernard Quotes
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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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Everything is poisonous, nothing is poisonous, it is all a matter of dose.
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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.
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Those who do not know the torment of the unknown cannot have the joy of discovery.
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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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When entering on new ground we must not be afraid to express even risky ideas so as to stimulate research in all directions. As Priestley put it, we must not remain inactive through false modesty based on fear of being mistaken.
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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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The terrain is everything; the germ is nothing.
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With the aid of these active experimental sciences man becomes an inventor of phenomena, a real foreman of creation; and under this head we cannot set limits to the power that he may gain over nature through future progress of the experimental sciences.
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It is what we know already that often prevents us from learning.
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In the philosophic sense, observation shows and experiment teaches.
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A discovery is generally an unforeseen relation not included in theory.
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Effects vary with the conditions which bring them to pass, but laws do not vary. Physiological and pathological states are ruled by the same forces; they differ only because of the special conditions under which the vital laws manifest themselves.
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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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Science does not permit exceptions.
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A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very significant fragments; and these fragments of universal truth are precisely what constitutes science.
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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.
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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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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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When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.
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Experiment is fundamentally only induced observation.
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Hatred is the most clear- sighted, next to genius.
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The investigator should have a robust faith – and yet not believe.
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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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True science teaches us to doubt and, in ignorance, to refrain.
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Priestley said that each discovery we make shows us many others that should be made.
CLAUDE BERNARD