Friedrich Nietzsche,
The Genealogy of Morals
(1921 (for translation))
“ It was first in the hands of the priest, real artist that he was in the feeling of guilt, that it took shape—oh, what a shape! "Sin"—for that is the name of the new priestly version of the animal "bad-conscience" (the inverted cruelty) — has up to the present been the greatest event in the history of the diseased soul; in "sin" we find the most perilous and fatal masterpiece of religious interpretation. Imagine man, suffering from himself, some way or other but at any rate physiologically, perhaps like an animal shut up in a cage, not clear as to the why and the wherefore! ”
