We must beware of one who is in a passion against us as of one who has once sought our life; for the fact that we still live is due to the absence of power to kill, - if looks could kill, we should have been dead long ago.

Sleeping is no mean art: for its sake one must stay awake all day.

Go up close to your friend, but do not go over to him! We should also respect the enemy in our friend.

Insanity in individuals is something rare - but in groups, parties, nations and epochs, it is the rule.

Around the hero everything turns into a tragedy, around the demigod, a satyr-play, and around God--what? perhaps a "world"?

Nothing has been purchased more dearly than the little bit of reason and sense of freedom which now constitutes our pride.

Objection, evasion, joyous distrust, and love of irony are signs of health; everything absolute belongs to pathology.