μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
(see also παραχωρέω): concede, yield, defer to, give up, give way, make room, yield precedence to
