Central to Plato’s thought is the theory of forms, which holds that there exists a realm of forms, perfect ideals of which things in this world are but imperfect copies. In this book, originally published in 1959, Feibleman finds two diverse strands in Plato’s philosophy: an idealism centered upon the Forms denying full ontological status to the realm of becoming, and a moderate realism granting actuality equal reality with Forms. For each strand Plato developed a conception of religion: a supernatural one derived from Orphism, and a naturalistic religion revering the traditional Olympian deities.