The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.

It is not doubt,is certitude that drives you mad.

Christians call it faith ... I call it the herd.

Where is the lightning to lick you with its tongue? Where is the madness with which you should be cleansed? Behold, I show you the Superman. He is this lightning, he is this madness.

Tragedy is dead! Poetry itself died with it! Away, away with you, puny, stunted imitators! Away with you to Hades, and eat your fill of the old masters' crumbs!

"Belief in the truth commences with the doubting of all those "truths" we once believed."

That roguish and cheerful vice, politeness.