Matthew 5:43

For without this love, wherewith we are commanded to love even our enemies and persecutors, who can fully carry out those things which are mentioned above? Moreover, the perfection of that mercy, wherewith most of all the soul that is in distress is cared for, cannot be stretched beyond the love of an enemy; and therefore the closing words are: "Be ye therefore perfect, even as your Father who is in heaven is perfect." Yet in such a way that God is understood to be perfect as God, and the soul to be perfect as a soul. That there is, however, a certain step [in advance] in the righteousness of the Pharisees, which belongs to the old law, is perceived from this consideration, that many men hate even those by whom they are loved; as, for instance, luxurious children hate their parents for restraining them in their luxury. That man therefore rises a certain step, who loves his neighbour, although as yet he hates his enemy. But in the kingdom of Him who came to fulfil the law, not to destroy it, he will bring benevolence and kindness to perfection, when he has carried it out so far as to love an enemy. For the former stage, although it is something, is yet so little that it may be reached even by the publicans as well. And as to what is said in the law, "Thou shalt hate thine enemy," it is not to be understood as the voice of command addressed to a righteous man, but rather as the voice of permission to a weak man.

(non occ.) The Lord has taught above that we must not resist one who offers any injury, but must be ready even to suffer more; He now further requires us to show to them that do us wrong both love and its effects. And as the things that have gone before pertain to the completion of the righteousness of the Law, in like manner this last precept is to be referred to the completion of the law of love, which, according to the Apostle, is the fulfilling of the Law. (ord.)

Ye have heard that it hath been said, Thou shalt love thy neighbour and hate thine enemy. But I say unto you, Love your enemies. Here the Lord has reached the very pinnacle of the virtues. For what is greater than to love one's enemies? …

Ye have heard that it hath been said,.... By, or to them of old time.

If God's grace and goodness are (as they certainly are) his glory, then the glory of the gospel is the glory that excels, for grace and truth came by Jesus Christ, 2 Cor. iii.

Ye have heard that it hath been said, Thou shalt love thy neighbor, and hate thine enemy - The command to love our neighbor was a law of God, Lev 19:18. That we must therefore hate our enemy was an inference drawn from it by the Jews. They supposed that if we loved the one, we must of course hate the other. They were total strangers to that great, special law of religion which requires us to love both.

We have here our Lord Jesus Christ’s rules for our conduct one towards another. He that would know how he ought to feel and act towards his fellow men, should often study these verses. They deserve to be written in letters of gold. They have extorted praise even from the enemies of Christianity. Let us mark well what they contain. The Lord Jesus forbids everything like an unforgiving and revengeful spirit. “I say unto you, that ye resist not evil.”

We have here our Lord Jesus Christ’s rules for our conduct one towards another. He that would know how he ought to feel and act towards his fellow men, should often study these verses. They deserve to be written in letters of gold. They have extorted praise even from the enemies of Christianity. Let us mark well what they contain. The Lord Jesus forbids everything like an unforgiving and revengeful spirit. “I say unto you, that ye resist not evil.” A readiness to resent injuries, a quickness in taking offense, a quarrelsome and contentious disposition, a keenness in asserting our rights—all all are contrary to the mind of Christ. The world may see no harm in these habits of mind, but they do not become the character of the Christian. Our Master says, “Resist not evil.” The Lord Jesus enjoins on us a spirit of universal love and charity. “I say unto you: Love your enemies.” We ought to put away all malice: we ought to return good for evil, and blessing for cursing. Moreover we are not to love in word only, but in deed; we are to deny ourselves, and take trouble, in order to be kind and courteous: “if any man compel thee to go a mile go with him twain.” We are to put up with much and bear much, rather than hurt another, or give offence. In all things we are to be unselfish. Our thought must never be, “How do others behave to me?” but “What would Christ have me to do?” A standard of conduct like this may seem, at first sight, extravagantly high. But we must never content ourselves with aiming at one lower. We must observe the two weighty arguments which our Lord uses to back up this part of his instruction. They deserve serious attention. For one thing, if we do not aim at the spirit and temper which are here recommended, we are not yet children of God. What does our “Father which is in heaven” do?

Thou shalt love thy neighbor, and hate thine enemy - Instead of πλησιον neighbor, the Codex Graevii, a MS. of the eleventh century, reads φιλον friend. Thou shalt love thy friend, and hate thine enemy. This was certainly the meaning which the Jews put on it: for neighbor, with them, implied those of the Jewish race, and all others were, considered by them as natural enemies. Besides, it is evident that πλησιον, among the Hellenistic Jews, meant friend merely: Christ uses it precisely in this sense in Luk 10:36, in answer to the question asked by a certain lawyer, Mat 5:29. Who of the three was neighbor (πλησιον friend) to him who fell among the thieves? He who showed him mercy; i.e. he who acted the friendly part. In Hebrew, רע reâ, signifies friend, which word is translated πλησιον by the Lxx. in more than one hundred places. Among the Greeks it was a very comprehensive term, and signified every man, not even an enemy excepted, as Raphelius, on this verse, has shown from Polybius. The Jews thought themselves authorized to kill any Jew who apostatized; and, though they could not do injury to the Gentiles, in whose country they sojourned, yet they were bound to suffer them to perish, if they saw them in danger of death. Hear their own words: “A Jew sees a Gentile fall into the sea, let him by no means lift him out; for it is written, Thou shalt not rise up against the blood of thy neighbor: - but this is not thy neighbor.” Maimon. This shows that by neighbor they understood a Jew; one who was of the same blood and religion with themselves.