This Persian fable was published in Golden Thoughts from Great Writers, printed in Bavaria, Circa 1900.
Every man has two angels—one on his right shoulder, and one on his left. When he does good, the angel on his right shoulder writes it down and seals it, because what is once well done is done for ever. When he does evil, the angel on his left shoulder writes it down, but does not seal it. He waits until midnight. If, before that time, the man bows down his head and says, “Gracious Allah! I have sinned; forgive me,” the angel rubs it out; but if not, then at midnight he seals the record, and the angel upon the right shoulder weeps.