Plutarch, De Se Ipsum Citra Invidiam Laudando, section 15 3:

ἡ γὰρ ἔργον ὁμοῦ· καὶ λόγον ἔχουσα προτροπὴ καὶ παράδειγμα καὶ ζῆλον οἰκεῖον ἔμψυχόσ ἐστι καὶ κινεῖ καὶ παροξύνει, καὶ μεθ’ ὁρμῆσ καὶ προαιρέσεωσ ἐλπίδασ ὡσ ἐφικτῶν καὶ οὐκ ἀδυνάτων παρίστησι.