Doing easily what others find difficult is talent; doing what is impossible for talent is genius.

Action and faith enslave thought, both of them in order not be troubled or inconvenienced by reflection, criticism, and doubt.

Latent genius is but a presumption. Everything that can be, is bound to come into being, and what never comes into being is nothing.

I am a spectator, so to speak, of the molecular whirlwind which men call individual life; I am conscious of an incessant metamorphosis, an irresistible movement of existence, which is going on within me - and this phenomenology of myself serves as a window opened upon the mystery of the world.

Uncertainty is the refuge of hope.

[I]t is truth alone-scientific, established, proved, and rational truth-which is capable of satisfying nowadays the awakened minds of all classes. We may still say perhaps, 'faith governs the world,'-but the faith of the present is no longer in revelation or in the priest-it is in reason and in science.

Nothing resembles pride so much as discouragement.