“And if you are not a bird, then beware of coming to rest above an abyss.”

“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.”

“My melancholy wants to rest in the hiding places and abysses of perfection: that is why I need music.”

“And if you gaze for long into an abyss, the abyss gazes also into you.”

“If you gaze long into an abyss, the abyss will gaze back into you?”

“When you look into an abyss, the abyss also looks into you.”

“When you stare into the abyss the abyss stares back at you.”