The soul "commands the body as a king commands his subjects or a parent his children. It commands lust as a master commands a slave, since it coerces and breaks it. Kings, emperors, magistrates, fathers, peoples rule their subjects and associates as the soul rules the body. Masters harass their slaves as the best part of the soul, which is wisdom, harasses the vicious and weak parts of the same soul, such as lusts, anger, and the other disturbing forces."
— St. Augustine (354-430)