"Consider the way “moral man” … is veiled behind moral formulas and concepts of decency — the way our actions are benevolently concealed by the concepts of duty, virtue, sense of community, honorableness, self-denial. … I am not suggesting that all this is meant to mask human malice and villainy, the wild animal in us; my idea is, on the contrary, that it is precisely as tame animals that we are a shameful sight and in need of the moral disguise."
January 1, 1970
https://en.wikiquote.org/wiki/Duty