If you gaze long into an abyss, the abyss also gazes into you.

• 

  One must be a sea to be able to receive a polluted stream without becoming unclean.

• 

  There are no facts, only interpretations.

• 

  He who fights with monsters should be careful lest he thereby become a monster.

• 

  The most common lie is the one with which a man deceives himself.

• 

  There is always some madness in love. But there is also always some reason in madness.

• 

  Man is a rope, tied between beast and overman — a rope over an abyss.

All aphorisms