What do you regard as most humane? To spare someone shame.

One who is always deeply involved in what he is doing is above all embarrassment.

Christianity remains to this day the greatest misfortune of humanity.

So far there has been no philosopher in whose hands philosophy has not grown into an apology for knowledge; on this point, at least, every one is an optimist, that the greatest usefulness must be ascribed to knowledge. They are all tyrannized over by logic, and this is optimism in its essence.

He who fights too long against dragons becomes a dragon himself; and if you gaze too long into the abyss, the abyss will gaze into you.

And once you are awake, you shall remain awake eternally.

Go through the towns and ask yourselves whether these people should reproduce! Let them go to their whores!