“He who fights with monsters should look to it that he himself does not become a monster . . . when you gaze long into the abyss the abyss also gazes into you”
“And if you gaze for long into an abyss, the abyss gazes also into you.”
“When you stare into the abyss the abyss stares back at you.”
“Always look on the bright side of the abyss”
“If you gaze long into an abyss, the abyss will gaze back into you?”
“Beware that, when fighting monsters, you yourself do not become a monster... for when you gaze long into the abyss. The abyss gazes also into you.”