It is what we think we know already that prevents us from learning. (Claude Bernard)
Men who have excessive faith in their theories or ideas are not only ill-prepared for making discoveries they also make poor observations. (Claude Bernard)
Hatred is the most clear-sighted, next to genius. (Claude Bernard)
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. (Claude Bernard)
The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from winch the virtues most valuable to investigators in physiology and medicine are derived. (Claude Bernard)
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)
The true worth of a researcher lies in pursuing what he did not seek in his experiment as well as what he sought. (Claude Bernard)
The investigator should have a robust faith - and yet not believe. (Claude Bernard)
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)
Mediocre men often have the most acquired knowledge. (Claude Bernard)
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. (Claude Bernard)
It is what we know already that often prevents us from learning. (Claude Bernard)