On all the walls, wherever walls exist, I will inscribe this eternal indictment of Christianity—I have letters to make even blind men see.... I call Christianity the single great curse, the single great innermost depravity, the single great instinct of revenge, for which no means is poisonous, secretive, subterranean, small enough—I call it mankind's single immortal blemish.... And we reckon time from the dies nefastus with which this calamity arose—following Christianity's first day!—Why not following its last day, instead?—Following today?—Transvaluation of all values!
Friedrich Nietzsche (1844–1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 6, p. 253, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). The Antichrist, section 62 (prepared for publication 1888, published 1895).
The Latin expression dies nefastus ("inauspicious day") is an allusion to the dies nefasti in the Roman calendar on which it was forbidden to transact legal or public business.