textThis is a work of moral psychology in the course of which is presented a theory on the nature of guilt. The point of departure is a psychological phenomenon that I call “scrupulousness.” Scrupulousness is present when someone is in doubt about the morality of a minor past action. He or she is obsessively driven to determine whether his act was right or wrong. The result for the individual is vexing preoccupation in a cycle of internal casuistry. I explain this unhappy phenomenon as the result of anxiety over guilt understood as moral staining. A moral stain is a persistent residue adhering to the self created by a past wrongful action. To better explain moral stains, I borrow Christine Korsgaard’s theory of personal identity as constitu...