“Whoever fights with monsters should see to it that he does not become one himself. And when you stare for a long time into an abyss, the abyss stares back into you.”
Quotes via Wikiquote (CC BY-SA), each with its original source.
Not who you're looking for? Others named Abyss: American professional wrestler · 2019 South Korean television series · mythologic bottomless pit · album by Lionsheart