Note 44 — Chapter I · SPECULATIVE PHILOSOPHY IN GREECE, BEFORE AND IN THE TIME OF SOKRATES.
Reading edition
Theophrast. Metaphys. 9. Probably the recognition of one dominant antithesis — Τὸ Ἕν — ἡ ἀόριστος Δυὰς — is the form given by Plato to the Pythagorean doctrine. Eudorus (in Simplikius ad Aristot. Physic. fol. 39) seems to blend the two together.