In action, in desire, we must submit perpetually to the tyranny of outside forces; but in thought, in aspiration, we are free, free from our fellowmen, free from the petty planet on which our bodies impotently crawl, free even, while we live, from the tyranny of death.

To be without some of the things you want is an indispensable part of happiness.

How about Pithecanthropus Erectus? Was it really he who ate the apple? Or was it Homo Pekiniensis?

I can't tell whether I am living in a dream or a nightmare.

The infliction of cruelty with a good conscience is a delight to moralists - that is why they invented hell.

When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others.

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.