Friedrich Nietzsche book Beyond Good and Evil
Beyond Good and Evil, Aphorism 146
Variant: He who fights with monsters should look to it that he himself does not become a monster. And if you gaze long into an abyss, the abyss also gazes into you.
Aphorism 146 from Jenseits von Gut und Böse (Beyond Good and Evil) an 1886 book by the German philosopher Friedrich Nietzsche.
Translated from: Wer mit Ungeheuern kämpft, mag zusehn, dass er nicht dabei zum Ungeheuer wird. Und wenn du lange in einen Abgrund blickst, blickt der Abgrund auch in dich hinein.
Source: Gutenberg-DE
Translation source: Hollingdale
Misattributed
Friedrich Nietzsche book Beyond Good and Evil
Beyond Good and Evil, Aphorism 146
Variant: He who fights with monsters should look to it that he himself does not become a monster. And if you gaze long into an abyss, the abyss also gazes into you.
Friedrich Nietzsche (1844–1900) German philosopher, poet, composer, cultural critic, and classical philologist
Variant: Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.
“He who fight monsters must take care that he doesn't become one himself.”
Anthony Horowitz book Scorpia Rising
Variant: A German philosopher once wrote that he who fights monsters must take care that he doesn't become one himself.
Source: Scorpia Rising
Friedrich Nietzsche (1844–1900) German philosopher, poet, composer, cultural critic, and classical philologist
“And when the abyss looks into you - and it will - may you look back unflinching.”
Neal Shusterman (1962) American novelist
Source: Challenger Deep
“Someday, he thought, I would like to meet a monster who looked like a monster.”
Ira Levin book The Boys from Brazil
The Boys from Brazil (1976)
“When you look into the abyss, it’s not supposed to wave back.”
Terry Pratchett book Thief of Time
Source: Thief of Time
Ilona Andrews American husband-and-wife novelist duo
Source: Magic Bites