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

If you shut up truth and bury it under the ground, it will but grow, and gather to itself such explosive power that the day it bursts through it will blow up everything in its way.

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

If you shut up truth, and bury it underground, it will but grow.

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.

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.