It is noble to teach oneself; it is still nobler to teach others.

Human beings seem to be a poor invention. If they are the noblest works of God where is the ignoblest?

I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.

We are discreet sheep; we wait to see how the drove is going, and then go with the drove.

Damn these human beings; if I had invented them I would go hide my head in a bag.

A man cannot be comfortable without his own approval. There is nothing more satisfying than that sense of being completely "at home" in your own skin. When you achieve that as a natural state of "being", then you can finally look beyond yourself and fully contribute all your talents to the world.

Make your vocation your vacation. That is the secret to success.