He who fights with monsters should be careful lest he thereby become a monster. And if thou gaze long into an abyss, the abyss will also gaze into th… - Friedrich Nietzsche

Battle not with monsters, lest ye become a monster, and if you gaze into the abyss, the abyss gazes also into you.

When you look into an abyss, the abyss also looks into you.

And if you gaze long enough into an abyss, the abyss will gaze back into you.

And if you gaze for long into an abyss, the abyss gazes also into you.

"To live with tremendous and proud composure; always beyond — . To have and not to have one's affects, one's pro and con, at will; to condescend to them, for a few hours; to seat oneself on them as on a horse, often as on an ass — for one must know how to make use of their stupidity as much as of their fire. To reserve one's three hundred foregrounds; also the dark glasses; for there are cases when nobody may look into our eyes, still less into our "grounds." And to choose for company that impish and cheerful vice, courtesy. And to remain master of one's four virtues: of courage, insight, sympathy, and solitude."

What was silent in the father speaks in the son, and often I found in the son the unveiled secret of the father.

And if you gaze for long into an abyss, the abyss gazes also into you.