The poisonous doctrine, “equal rights for all,” has been propagated as a Christian principle: out of the secret nooks and crannies of bad instinct Christianity has waged a deadly war upon all feelings of reverence and distance between man and man, which is to say, upon the first prerequisite to every step upward, to every development of civilization—out of the ressentiment of the masses it has forged its chief weapons against us, against everything noble, joyous and high-spirited on earth, against our happiness on earth
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Nietzsche on Fighting Monsters
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 thee.