One must be arrogant, indeed, to imagine that one can take everything in one's hand and know everything!

In Paris, everything's for sale: wise virgins, foolish virgins, truth and lies, tears and smiles.

I defy you to find any real will, any reasoning force, outside of life. And everything is there; there is, in the world, no other will than this force which impels everything to life, a life even broader and higher.

The fear of life, the fear of burdens and of duties, of annoyances and of catastrophes! The fear of life, which makes us, through dread of its sufferings, refuse its joys. Ah! I tell you, this cowardliness enrages me; I cannot forgive it. We must live - live a complete life - live all our life.

I believe that the future of humanity is in the progress of reason through science. I believe that the pursuit of truth, through science, is the divine ideal which man should propose to himself.

If I cannot overwhelm with my quality, I will overwhelm with my quantity.