The man of knowledge must be able not only to love his enemies but also to hate
his friends.
Digressions, objections, delight in
mockery & carefree mistrust are signs of
health; everything unconditional belongs
in pathology.
He who fights with monsters might take
care lest he thereby become a monster.
And if you gaze for long into an abyss,
the abyss gazes also into you.
