μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
hay que rechazar αὐτούς ref. a unos herejes, Clem.Al.Strom.3.6.45.
