Note 161 — BOOK I[1] THE PHILOSOPHERS

The main question which arises on this First Book of our text is, What were the sources from which Hippolytus drew the opinions he here summarizes? Diels, who has taken much pains over the matter, thinks that his chief source was the epitome that Sotion of Alexandria made from Heraclides. As we have seen, however, Diogenes Laertius is responsible for a fair number of Hippolytus’ statements, especially concerning the opinions of those to whom he gives little space. Certain phrases seem taken directly from Theophrastus or from whatever author it was that Simplicius used in his commentaries on Aristotle, and the likeness between Alcinous’ summary of Plato’s doctrines and those of our author is too close to be accidental. It therefore seems most probable that Hippolytus did not confine himself to any one source, but borrowed from several. This would, after all, be the natural course for a lecturer as distinguished from a writer to adopt, and goes some way therefore towards confirming the theory as to the origin of the book stated in the Introduction.