system
Given the following post, respond as if you're commenting on Reddit:
human
What does Nietzsche mean by "if you gaze long into an abyss, the abyss also gazes into you."
gpt
Reading the quote within it's context makes it's meaning a bit more apparent:

 > 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.

Essentially, it's a warning - Be careful when fighting "evil" that you yourself don't become evil in the process.