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)
adj.
P. and V. κακός, δυστυχής, δύσφημος (Plat. but rare P.), V. κακόγλωσσος, σκαιός, εὐώνυμος (Aesch., P.V. 490). Inauspicious words: P. and V. βλασφημία, ἡ (Plat.), V. δυσφημία, ἡ. Utter inauspicious words, v.: P. βλασφημεῖν. V. δυσφημεῖν.