Little is known about 2nd century Greek Stoic philosopher Hierocles. He was famous for his Elements of Ethics, a book which was thought to be lost until part of it was discovered in a papyrus fragment in 1901. The 300 line fragment discusses self-perception, and argues that all birds, reptiles, and mammals from the moment of birth perceive themselves continuously and that self-perception is both the primary and the most basic faculty of animals. Other...