Note 23 — Chapter XVI · ERASTÆ OR ANTERASTÆ — RIVALES.
Reading edition
See about ἡ τοῦ μετρίου φύσις as οὐσία — as ὄντως γιγνόμενον. — Plato, Politikus, 283-284. Compare also the Philêbus, p. 64 D, and the Protagoras, pp. 356-357, where ἡ μετρητικὴ τέχνη is declared to be the principal saviour of life and happiness.