Never trust a thought that didn't come by walking.

Reason is the cause of our falsification of the evidence of the senses. In so far as the senses show becoming, passing away, change, they do not lie.

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

Early in the morning, at break of day, in all the freshness and dawn of one's strength, to read a book -I call that vicious!

If we have our own why of life, we shall get along with almost any how. Man does not strive for pleasure; only the Englishman does.

I am opposed to socialism because it dreams ingenuously of good, truth, beauty, and equal rights.

It is an end with priests and gods, if man becomes scientific. Moral: science is the thing forbidden in itself - it alone is forbidden. Science is the first sin, the germ of all sin, original sin. This alones is mortality: Thou shalt not know.