Experimentation is an active science.
Observation is a passive science, experimentation an active science.
It is what we know already that often prevents us from learning.
Science increases our power in proportion as it lowers our pride.
Art is I science is we.
Science does not permit exceptions.
Science increases our understanding in proportion as it lowers our pride.
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 foreve...
The investigator should have a robust faith - and yet not believe.
Mediocre men often have the most acquired knowledge.
It's what we think we know that keeps us from learning.
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.