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 investigator should have a robust faith – and yet not believe. – Claude Bernard
It is what we know already that often prevents us from learning. – Claude Bernard
Observation is a passive science, experimentation an active science. – Claude Bernard
A permanent base on Mars would have a number of advantages beyond being a bonanza for planetary science and geology. If, as some evidence suggests, exotic micro-organisms have arisen independently of terrestrial life, studying them could revolutionise biology, medicine and biotechnology. – Paul Davies