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

— Friedrich Nietzsche
„The person who fights monsters should make sure that in the process, he does not become a monster himself. Because when you stare down at an abyss, the abyss stares back at you.“
— Friedrich Nietzsche
„We are two abysses — a well staring at the sky.“
— Fernando Pessoa
„When you look into the abyss, it’s not supposed to wave back.“
— Terry Pratchett
„There are times when those eyes inside your brain stare back at you.“
— Charles Bukowski
„He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you.“
— Friedrich Nietzsche
„He who fights too long against dragons becomes a dragon himself; and if you gaze too long into the abyss, the abyss will gaze into you.“
— Friedrich Nietzsche
„And if you are not a bird, then beware of coming to rest above an abyss.“
— Friedrich Nietzsche
„If you become involved with me, you will be throwing yourself into the abyss.“
— Franz Kafka
„When nobody will look at you, you can stare a hole in them. Picking out all the little details you'd never stare long enough to get if they'd even just return your gaze, this, this is your revenge.“
— Chuck Palahniuk
„You're staring at me," Simon said. "Why are you staring at me? Have I got something on my face?“
— Cassandra Clare