If you get up one more time than you fall, you will make it through.

I had a lover's quarrel with the world.

I hate cynicism, it's my least favorite quality and it doesn't lead anywhere.

I preach freedom of the mind through freedom of the body.

Everything can be taken from a man but ... the last of the human freedoms — to choose ones attitude in any given set of circumstances, to choose ones own way.

I've chosen the work I want to do. If I find no joy in it, then I'm only condemning myself to sixty years of torture.

The important thing is not to stop questioning. Curiosity has its own reason for existing.