Without the errors involved in the assumptions of ethics, man would have remained an animal. Thus has he taken himself as something higher and imposed rigid laws upon himself.

A person must have a good memory to keep the promises he has made. A person must have a strong imagination to be able to have pity. So closely is morality tied to the quality of the intellect.

Our greatest experiences are our quietest moments.

The earth has become small, and on it hops the last man, who makes everything small. His race can no more be exterminated than the flea can be. The last man lives the longest.

What was silent in the father speaks in the son, and often I found in the son the unveiled secret of the father.

One must learn to be a sponge if one wants to be loved by hearts that overflow.

I desire that your conjectures should not reach beyond your creative will. Could you create a god? Then do not speak to me of any gods.