Note 118 — BOOK I[1] THE PHILOSOPHERS
Francis Legge translation
I do not think this can be found in any writings of Plato that have come down to us. Hippolytus probably took it from Aristotle, to whom he also attributes it; but I cannot find it in this writer either. A passage in Arist., Nicomachean Ethics, Book II, c. 6, is the nearest to it.