5:38-42 The plain instruction is, Suffer any injury that can be borne, for the sake of peace, committing your concerns to the Lord's keeping. And the sum of all is, that Christians must avoid disputing and striving. If any say, Flesh and blood cannot pass by such an affront, let them remember, that flesh and blood shall not inherit the kingdom of God; and those who act upon right principles will have most peace and comfort.
39. But I say unto you, That ye resist not evil; but whosoever shall smite thee on thy right check, turn to him the other also—Our Lord's own meek, yet dignified bearing, when smitten rudely on the cheek (Joh 18:22, 23), and not literally presenting the other, is the best comment on these words. It is the preparedness, after one indignity, not to invite but to submit meekly to another, without retaliation, which this strong language is meant to convey.