Note 112 — Chapter X · ETHICS. THE GENERAL PRINCIPLES OF THE STOIC ETHICS. ABSTRACT THEORY OF MORALITY.
Oswald J. (Oswald Joseph) Reichel translation
Plut. Vir. Mor. 2: Ἀρίστων δὲ ὁ Χῖος τῇ μὲν οὐσίᾳ μίαν καὶ αὐτὸς ἀρετὴν ἐποίει καὶ ὑγίειαν ὠνόμαζε, κ.τ.λ. Id. on Zeno, see p. 260, 3, and Cleanthes, p. 236, 3. According to Galenus, Aristo defined the one virtue to be the knowledge of good and evil (Hipp. et Plat. v. 5, p. 468): κάλλιον οὖν Ἀρίστων ὁ Χῖος, οὔτε πολλὰς εἶναι τὰς ἀρετὰς τῆς ψυχῆς ἀποφηνάμενος, ἀλλὰ μίαν, ἣν ἐπιστήμην ἀγαθῶν τε καὶ κακῶν εἶναί φησιν. vii. 2, p. 595. νομίσας γοῦν ὁ Ἀρίστων, μίαν εἶναι τῆς ψυχῆς δύναμιν, ᾗ λογιζόμεθα, καὶ τὴν ἀρετὴν τῆς ψυχῆς ἔθετο μίαν, ἐπιστήμην ἀγαθῶν καὶ κακῶν. The statement that Aristo made health of soul consist in a right view of good and evil agrees with the language of Plutarch. Perhaps Zeno had already defined φρόνησις as ἐπιστήμη ἀγαθῶν καὶ κακῶν. ↑