We must never make experiments to confirm our ideas, but simply to control them. — Claude Bernard Copy Share Image
Priestley [said] that each discovery we make shows us many others that should be made. — Claude Bernard Copy Share Image
We achieve more than we know. We know more than we understand. We understand more than we can explain. — Claude Bernard Copy Share Image
The minds that rise and become really great are never self-satisfied, but still continue to strive. — Claude Bernard Copy Share Image
Observation is a passive science, experimentation an active science. — Claude Bernard Copy Share Image
We must alter theory to adapt it to nature, but not nature to adapt it to theory. — Claude Bernard Copy Share Image
A contemporary poet has characterized this sense of the personality of art and of the impersonality of science in these words,-'Art is… — Claude Bernard Copy Share Image
A great discovery is a fact whose appearance in science gives rise to shining ideas, whose light dispels many obscurities and shows… — Claude Bernard Copy Share Image
We must remain, in a word, in an intellectual disposition which seems paradoxical, but which, in my opinion, represents the true mind… — Claude Bernard Copy Share Image
When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the… — Claude Bernard Copy Share Image
Science admits no exceptions; otherwise there would be no determinism in science, or rather, there would be no science. — Claude Bernard Copy Share Image
We must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our theories, is… — Claude Bernard Copy Share Image
The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from which… — Claude Bernard Copy Share Image
The goal of scientific physicians in their own science ... is to reduce the indeterminate. Statistics therefore apply only to cases in… — Claude Bernard Copy Share Image
It is impossible to devise an experiment without a preconceived idea; devising an experiment, we said, is putting a question; we never… — Claude Bernard Copy Share Image
Men who have excessive faith in their theories ... make poor observations, because they choose among the results of their experiments only… — Claude Bernard Copy Share Image
Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really… — Claude Bernard Copy Share Image
In the patient who succumbed, the cause of death was evidently something which was not found in the patient who recovered; this… — Claude Bernard Copy Share Image
Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on… — Claude Bernard Copy Share Image
Effects vary with the conditions which bring them to pass, but laws do not vary. Physiological and pathological states are ruled by… — Claude Bernard Copy Share Image
The constancy of the internal environment is the condition for free and independent life: the mechanism that makes it possible is that… — Claude Bernard Copy Share Image
In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes,… — Claude Bernard Copy Share Image
“The true worth of a researcher lies in pursuing what he did not seek in his experiment as well as what he… — Claude Bernard Copy Share Image
The science of life is a superb and dazzlingly lighted hall which may be reached only by passing through a long and… — Claude Bernard Copy Share Image
Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these despisers of… — Claude Bernard Copy Share Image
The better educated we are and the more acquired information we have, the better prepared shall we find our minds for making… — Claude Bernard Copy Share Image
With the aid of these active experimental sciences man becomes an inventor of phenomena, a real foreman of creation; and under this… — Claude Bernard Copy Share Image
Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries; they also make very… — Claude Bernard Copy Share Image
In these researches I followed the principles of the experimental method that we have established, i.e., that, in presence of a well-noted,… — Claude Bernard Copy Share Image
In every enterprise ... the mind is always reasoning, and, even when we seem to act without a motive, an instinctive logic still directs… — Claude Bernard Copy Share
Descriptive anatomy is to physiology what geography is to history, and just as it is not enough to know the typography of a country… — Claude Bernard Copy Share
Mediocre men often have the most acquired knowledge. It is in the darker. It is in the darker regions of science that great men… — Claude Bernard Copy Share
Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and… — Claude Bernard Copy Share
If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic which, in… — Claude Bernard Copy Share
Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry… — Claude Bernard Copy Share
Tout est poison, rien n'est poison, tout est une question de dose. Everything is poisonous, nothing is poisonous, it is all a matter of… — Claude Bernard Copy Share
A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes. — Claude Bernard Copy Share
We must remain, in a word, in an intellectual disposition which seems paradoxical, but which, in my opinion, represents the true mind of the… — Claude Bernard Copy Share
The fact that knowledge endlessly recedes as the investigator is about to grasp it is what constitutes at the same time his torment and… — Claude Bernard Copy Share
But while I accept specialization in the practice, I reject it utterly in the theory of science. — Claude Bernard Copy Share
Men who have excessive faith in their theories ... make poor observations, because they choose among the results of their experiments only what suits… — Claude Bernard Copy Share
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