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
Fact, Which, Itself, Attached
Man can learn nothing except by going from the known to the unknown.
- Claude Bernard
Learn, Going, Known, Unknown
Observation is a passive science, experimentation an active science.
- Claude Bernard
Science, Observation, Active, Passive
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
Every Day, Hidden, Teaching, Primary
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
True Worth, Pursuing, Also, Seeks
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
Leave, Laboratory, Overcoat, Enter
Science does not permit exceptions.
- Claude Bernard
Science, Permit, Does, Exceptions
Mediocre men often have the most acquired knowledge.
- Claude Bernard
Men, Mediocre, Most, Acquired
Experimentation is an active science.
- Claude Bernard
Science, Active, Experimentation
It is what we know already that often prevents us from learning.
- Claude Bernard
Learning, Know, Often, Prevents
The investigator should have a robust faith - and yet not believe.
- Claude Bernard
Faith, Should, Investigator, Robust
The experimenter who does not know what he is looking for will not understand what he finds.
- Claude Bernard
Will, Finds, Does, Looking
Art is I; science is we.
- Claude Bernard
Art, Science
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