Whoever has looked deeply into the world might well guess what wisdom lies in the superficiality of men.

We would not let ourselves be burned to death for our opinions: we are not sure enough of them for that.

Mathematics would certainly have not come into existence if one had known from the beginning that there was in nature no exactly straight line, no actual circle, no absolute magnitude.

You're going to women? Don't forget your whip!

What was a lie in the father becomes a conviction in the son.

"This - is now my way - where is yours"? Thus did I answer those who asked me "the way". For the way - it does not exist!

What we experience in dreams - assuming that we experience it often - belongs in the end just as much to the over-all economy of our soul as anything experienced "actually": we are richer or poorer on account of it.