Experimentation is an active science. – Claude Bernard
The investigator should have a robust faith – and yet not believe. – Claude Bernard

Experimentation is an active science. – Claude Bernard
The investigator should have a robust faith – and yet not believe. – 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
Observation is a passive science, experimentation an active science. – Claude Bernard