He who denies himself much in great matters will readily indulge himself in small things.

Man is more ape than many of the apes.

Every deep thinker is more afraid of being understood than of being misunderstood.

Assuming that he believes at all, the everyday Christian is a pitiful figure, a man who really cannot count up to three, and who besides, precisely because of his mental incompetence, would not deserve such a punishment as Christianity promises him.

I cannot believe in a God who wants to be praised all the time.

What, then is truth?... Truths are illusions about which one has forgotten that this is what they are.

The magnitude of a progress is gauged by the greatness of the sacrifice that it requires.