The Refutation of All Heresies

Socrates, then, was a hearer of Archelaus, the natural philosopher; and he, reverencing the rule, “Know thyself,” and having assembled a large school, had Plato (there), who was far superior to all his pupils. (Socrates) himself left no writings¹⁰⁸ after him. Plato, however, taking notes¹⁰⁹ of all his (lectures on) wisdom, established a school, combining together natural, ethical, (and) logical (philosophy). But the points Plato determined are these following.