The doubter is a true man of science; he doubts only himself and his interpretations, but he believes in science.
Science increases our power in proportion as it lowers our pride.
Man can learn nothing except by going from the known to the unknown.
The experimenter who does not know what he is looking for will not understand what he finds.
Mediocre men often have the most acquired knowledge.
It is what we think we already know that often prevents us from learning.
We must never make experiments to confirm our ideas, but simply to control them.
Man can learn nothing unless he proceeds from the known to the unknown.
A modern poet has characterized the personality of art and the impersonality of science as follows: Art is I: Science is We.
If I had to define life in a word, it would be: Life is creation.
Indeed, proof that a given condition always precedes or accompanies a phenomenon does not warrant concluding with certainty that a given condition is the immediate cause of that phenomenon. It must still be established that when this condition is removed, the phenomen will no longer appear.
Science repulses the indefinite.
The science of life is a superb and dazzlingly lighted hall which may be reached only by passing through a long and ghastly kitchen.
Observation is a passive science, experimentation an active science.
The mental never influences the physical. It is always the physical that modifies the mental, and when we think that the mind is diseased, it is always an illusion.