Obervation is a passive science, experimentation is an active science. — Claude Bernard Copy Share Image
In the philosophic sense, observation shows and experiment teaches. — Claude Bernard Copy Share Image
A discovery is generally an unforeseen relation not included in theory. — Claude Bernard Copy Share Image
The joy of discovery is certainly the liveliest that the mind of man can ever feel. — Claude Bernard Copy Share Image
But while I accept specialization in the practice, I reject it utterly in the theory of science. — Claude Bernard Copy Share Image
Man can learn nothing unless he proceeds from the known to the unknown. — Claude Bernard Copy Share Image
Particular facts are never scientific; only generalization can establish science. — Claude Bernard Copy Share Image
[Those] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but… — Claude Bernard Copy Share Image
Now, a living organism is nothing but a wonderful machine endowed with the most marvellous properties and set going by means of… — Claude Bernard Copy Share Image
Theories are like a stairway; by climbing, science widens its horizon more and more, because theories embody and necessarily include proportionately more… — Claude Bernard Copy Share Image
A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very… — Claude Bernard Copy Share Image
If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic… — Claude Bernard Copy Share Image
The doubter is a true man of science: he doubts only himself and his interpretations, but he believes in science. — Claude Bernard Copy Share Image
Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of… — Claude Bernard Copy Share Image
The eloquence of a scientist is clarity; scientific truth is always more luminous when its beauty is unadorned than when it is… — Claude Bernard Copy Share Image
When entering on new ground we must not be afraid to express even risky ideas so as to stimulate research in all… — Claude Bernard Copy Share Image
Mediocre men often have the most acquired knowledge. It is in the darker. It is in the darker regions of science that… — Claude Bernard Copy Share Image
It has often been said that, to make discoveries, one must be ignorant. This opinion, mistaken in itself, nevertheless conceals a truth.… — Claude Bernard Copy Share Image
Real science exists, then, only from the moment when a phenomenon is accurately defined as to its nature and rigorously determined in… — Claude Bernard Copy Share Image
Proof that a given condition always precedes or accompanies a phenomenon does not warrant concluding with certainty that a given condition is… — Claude Bernard Copy Share Image
Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists… — 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… — Claude Bernard Copy Share Image
In a word, I consider hospitals only as the entrance to scientific medicine; they are the first field of observation which a… — Claude Bernard Copy Share Image
Man does not limit himself to seeing; he thinks and insists on learning the meaning of phenomena whose existence has been revealed… — Claude Bernard Copy Share Image
The physiologist is not a man of the world, he is a scientist, a man caught and absorbed by a scientific idea… — Claude Bernard Copy Share Image
As soon as the circumstances of an experiment are well known, we stop gathering statistics. ... The effect will occur always without… — Claude Bernard Copy Share Image
Laplace considers astronomy a science of observation, because we can only observe the movements of the planets; we cannot reach them, indeed,… — Claude Bernard Copy Share Image
I do not ... reject the use of statistics in medicine, but I condemn not trying to get beyond them and believing… — Claude Bernard Copy Share Image
To be worthy of the name, an experimenter must be at once theorist and practitioner. While he must completely master the art… — Claude Bernard Copy Share Image
Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists… — Claude Bernard Copy Share Image
When a physician is called to a patient, he should decide on the diagnosis, then the prognosis, and then the treatment. ...… — Claude Bernard Copy Share Image
The first requirement in using statistics is that the facts treated shall be reduced to comparable units. — Claude Bernard Copy Share Image
In science, the best precept is to alter and exchange our ideas as fast as science moves ahead. — 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