Tilting at windmills hurts you more than the windmills.

A poet who reads his verse in public may have other nasty habits.

I don't trust a man who talks about ethics when he is picking my pocket. But if he is acting in his own self-interest and says so, I have usually been able to work out some way to do business with him.

There was one field in which man was unsurpassed; he showed unlimited ingenuity in devising bigger and more efficient ways to kill off, enslave, harass, and in all ways make an unbearable nuisance of himself to himself.

Thou art god, I am god. All that groks is god.

We have our hands, we have our brains, we have the challenge all around us, and we have within (from whatever source) the will to strive. That is enough; there is no need to assert 'belief' in that which we do not, as yet, know.

If we blow ourselves up we will do it by misapplication of science; if we manage to keep from blowing ourselves up, it will be through intelligent application of science.