Be careful when you fight the monsters, lest you become one.

No man ever wrote more eloquently and luminously [than Heraclitus].

For both parties in a controversy, the most disagreeable way of retaliating is to be vexed and silent; for the aggressor usually regards the silence as a sign of contempt.

A Dionysian life task needs the hardness of the hammer and one of its first essentials is without doubt the joy to be found even in destruction.

A woman may very well form a friendship with a man, but for this to endure, it must be assisted by a little physical antipathy.

What is the vanity of the vainest man compared with the vanity which the most modest possesses when, in the midst of nature and the world, he feels himself to be man!

What, if some day or night a demon were to steal after you into your loneliest loneliness and say to you: 'This life as you now live it and have lived it, you will have to live once more and innumerable times more' ... Would you not throw yourself down and gnash your teeth and curse the demon who spoke thus? Or have you once experienced a tremendous moment when you would have answered him: 'You are a god and never have I heard anything more divine.