Claude Bernard Quotes

Most popular Claude Bernard Quotes

Art is I; science is we.

art science science & art

Science does not permit exceptions.
— Claude Bernard
The investigator should have a robust faith—and yet not believe.
— Claude Bernard

experiments science research

The investigator should have a robust faith - and yet not believe.
— Claude Bernard


Observation is a passive science, experimentation an active science.
— Claude Bernard
Man can learn nothing unless he proceeds from the known to the unknown.
— Claude Bernard
The doubter is a true man of science; he doubts only himself and his interpretations, but he believes in science.
— Claude Bernard

doubt science

A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes.

facts ideas

It seems, indeed, a necessary weakness of our mind to be able to reach truth only across a multitude of errors and obstacles.

mistakes mind error truth

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.
— Claude Bernard

experiments science

Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries; they also make very poor observations.


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.


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.