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.
Friedrich NietzscheWhen, however, you have an enemy, then do not requite him good for evil: for that would shame him. Instead, prove that he did some good for you. And rather be angry than put to shame! And when you are cursed, I do not like it that you want to bless. Rather curse a little also! And if you are done a great injustice, then quickly add five small ones. Hideous to behold is he who is obsessed with an injustice.
Friedrich NietzscheThe wisest man would be the one richest in contradictions, who has, as it were, antennae for all types of men---as well as his great moments of grand harmony---a rare accident even in us! A sort of planetary motion---
Friedrich Nietzsche