2. "Original sin" is the hereditary but impersonal fault of Adam's descendants, who have sinned in him (Rom. v. 12). It is the loss of grace, and therefore of eternal life, together with a propensity to evil, which everybody must, with the assistance of grace, penance, resistance and moral effort, repress and conquer. (Papal Encyclical, Mit Brennender Sorge, 14 March 1937).