A.T. Robertson Commentary Romans 12:21

"Be not overcome of evil, but overcome evil with good." — Romans 12:21 (ASV)

Be not overcome of evil (μη νικω υπο του κακου). Present passive imperative of νικαω, to conquer. "Stop being conquered by the evil (thing or man),"

But overcome evil with good (αλλα νικα εν τω αγαθω το κακον). "But keep on conquering the evil in the good." Drown the evil in the good. Seneca: Vincit malos pertinax bonitas.