As the cleansing of a metal object produces a shine in it, so is the cleansing of the heart especially from feeling that produces humiliation. When a person thinks, "I have been wrong by acting in a certain way," "by saying a certain thing," or "by having thought something which should not have crossed my mind," he loses, so to speak, a radiance which even beams out through his countenance and which is called in Persian Abi ruh, meaning "the radiance of the face."