ταῦτ' ἂν εἴη βλαβερά

From LSJ

Φιλόπονος ἴσθι καὶ βίον κτήσῃ καλόν → Si non laboris te piget, vives bene → Sei arbeitsam, dann hast du reichlich Lebensgut

Menander, Monostichoi, 527

Greek > English (Woodhouse)

these doctrines must be harmful