Close beside my knowledge lies my black ignorance.

We have to be careful that in throwing out the devil, we don't throw out the best part of ourselves.

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.

Thoughts are the shadows of our feelings - always darker, emptier and simpler.

One who dresses in rags that have been washed clean dresses cleanly to be sure, but raggedly nonetheless.

A man who wills commands something within himself that renders obedience, or that he believes renders obedience.

Every fact and every work exercises a fresh persuasion over every age and every new species of man. History always enunciates new truths.