English: 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.
Toki Pona: jan ni li utala e akesi suli. ona li selo e sama ona li kama ala sama akesi suli. tenpo suli la sina lukin lon anpa la anpa li lukin kin lon sina insa.