What Europe owes to the Jews? - Many things, good and bad, and above all one thing of the nature both of the best and the worst: the grand style in morality, the fearfulness and majesty of infinite demands, of infinite significations, the whole Romanticism and sublimity of moral questionableness - and consequently just the most attractive, ensnaring, and exquisite element in those iridescences and allurements to life, in the aftersheen of which the sky of our European culture, its evening sky, now glows - perhaps glows out.

Every living body continuously eliminates feces, it rejects what is not serviceable to the assimilating organism: what man despises, what arouses his disgust, what he calls evil, are excrements.

That the world is not the embodiment of an eternal rationality can be conclusively proved by the fact that the piece of the worldthat we know--I mean our human reason--is not so very rational. And if it is not eternally and completely wise and rational, then the rest of the world will not be either; here the conclusion a minori ad majus, a parte ad totum applies, and does so with decisive force.

Morality is neither rational nor absolute nor natural. World has known many moral systems, each of which advances claims universality; all moral systems are therefore particular, serving a specific purpose for their propagators or creators, and enforcing a certain regime that disciplines human beings for social life by narrowing our perspectives and limiting our horizons.

I'm not upset that you lied to me, I'm upset that from now on I can't believe you.

What I understand by "philosopher": a terrible explosive in the presence of which everything is in danger.

What doesn't kill you make you stronger.