Already at the origin of the species man was equal to what he was destined to become.

Somebody told me I should put a pebble in my mouth to cure my stuttering. Well, I tried it, and during a scene I swallowed the pebble. That was the end of that.

To reflect is to disturb one's thoughts.

We find it easy to believe that praise is sincere: why should anyone lie in telling us the truth?

It is sometimes important for science to know how to forget the things she is surest of.

The biologist passes. The frog stays the same.

Science has made us gods even before we are worthy of being men.