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
Profession: Psychologist
Nationality: French
Some suggestions for you :
It is what we know already that often prevents us from learning.
Man can learn nothing unless he proceeds from the known to the unknown.
The investigator should have a robust faith - and yet not believe.
The experimenter who does not know what he is looking for will not understand what he finds.
Observation is a passive science, experimentation an active science.