αὐτεθελεί

From LSJ

μὴ τὴν ὄψιν καλλωπίζου, ἀλλ' ἐν τοῖς ἐπιτηδεύμασιν ἴσθι καλός → Don't beautify your face, but be beautiful in your habits (Thales, in Diog. Laertius 1.37)

Source

Greek (Liddell-Scott)

αὐτεθελεί: ἐπίρρ. ἐξ ἰδίας θελήσεως, ἑκοντί, ἐθελοντί, Ἀττ. Ἐπιγραφ. ἐν Βοικχ. Πολ. Οἰκ. Ἀθ.