Matthew 5:39–44

Matthew 5:39 · Darby

But *I* say unto you, not to resist evil; but whoever shall strike thee on thy right cheek, turn to him also the other;

Jesus has just quoted the old rule of "an eye for an eye." Now He tells His disciples to meet a personal insult with the other cheek. Two questions follow at once: is He overturning justice itself, and did He mean this literally?

The Rule He Quotes

The words Jesus repeats come from Israel's law. They belonged in a courtroom, not in a private quarrel.

This law contained moral directions for the life of each Israelite. It contained ceremonial directions too — the laws of the offerings, so that the children of Israel could serve God. And it contained legal directions to regulate the daily life of the people. The principle of "an eye for an eye, and a tooth for a tooth" belongs to the last group. It is not a principle for one person's conscience. It is a legal direction for the authorities and judges of Israel. This is clear from Exodus 21:22 and Deuteronomy 19:18, where the judges are expressly mentioned. The direction rested on absolute fairness in repaying the deed. It was also meant to warn the people and hold them back (Deut. 19:20).

Modernised from Arend RemmersOriginal wording

Beyond Righteous, To Gracious

So Jesus is not calling the old measure unfair. He is asking for something the law never asked.

It is not that it is wrong for a man to punish according to the injury that has been inflicted on another. "An eye for an eye, and a tooth for a tooth" is perfectly righteous. But our Lord shows that we ought to be much more than righteous. We ought to be gracious… It is clear the Lord has no reference here to what governments have to do… He is speaking of personal injury. The evil done may be ever so undeserved, but it has to be overcome with good. Show that you are willing to take even more for Christ's sake.

Modernised from William KellyOriginal wording

Why The Right Cheek

The detail of which cheek is struck is not decoration. It marks the blow as an insult rather than an injury.

At that time a slap in the face was a deep insult. It was even more humiliating when it came with the back of the hand and so landed on the right cheek. According to the Jewish Talmud this offence "weighed double" compared to an ordinary slap. The disciples of the Lord Jesus ought not to look for reparation before men, but to suffer offences (compare 1 Peter 2:20). It reminds us of what Isaiah foretold about our Lord: "I gave my back to those who strike, and my cheeks to those who pull out the beard; I hid not my face from disgrace and spitting" (Isa. 50:6).

Modernised from Arend RemmersOriginal wording

What The Verse Does Not Cover

The command has a boundary, and the wording draws it — every case Jesus lists happens to you.

There is no supposition that the law or its penalties are abolished. The government of the world is not in question. What is in question is the path of disciples in it… We may still turn the left cheek to the man who strikes the right. We may let the man who sues us have the cloak as well as the coat he took by fraud. That is clearly within our rights. If the cause were someone else's, we would have no such right. We may not help men escape justice or make light of it. The Lord could never lay down a general rule that His people should allow lawlessness, or shrug at the rights of others. He speaks only of what is personal to oneself — "slaps you," "sues you," "forces you."

Modernised from Numerical Bible NotesOriginal wording

The Objection From Christ's Trial

Many soften the saying by pointing to Jesus' own reply when a servant struck Him at His trial. Kelly answers that objection:

Some pare down and whittle away His words. They are not ashamed to argue that He did not mean them literally. Their reason: when He was struck on the face for His answer to the high priest, He protested calmly while bowing to the insult. Was this paying evil back in its own coin? On the contrary. This was One who did no sin, and no deceit was found in His mouth. When He was reviled, He did not revile in return. When He suffered, He did not threaten. In fact He presented far more than the other cheek. They spat in His face, beat Him, and struck Him with their hands in utmost contempt.

Modernised from William KellyOriginal wording

Where The Power Comes From

This life is not a stricter rule to try harder at. It is a different path altogether.

The saint is given a path through this world which has nothing to do with the world, but which displays the character of Christ in it. … This would not be righteousness, but Christ displayed.

Modernised from J. N. DarbyOriginal wording

Summary

- Law — "an eye for an eye" was a fair rule handed to Israel's judges, never a licence for the injured man to settle his own score.

- Grace — Jesus does not call that rule unjust. He calls His disciples past justice into grace, ready to bear more wrong instead of repaying it.

- Christ — the standard is His own face, given to those who struck and spat. The disciple follows a Master who took far more than one blow.

- Limits — the wording keeps it personal: he slaps you, sues you, forces you. It gives no cover to lawlessness and no right to give away what belongs to someone else.

- Life — this path is not law kept better but Christ displayed: a way through the world that has nothing to do with the world.

Matthew 5:40 · Darby

and to him that would go to law with thee and take thy body coat, leave him thy cloak also.

Jesus takes a case that any listener could picture: a lawsuit that strips a man of his clothing. His answer goes beyond the measured justice of "an eye for an eye." But how far does it reach? Does it bind the courts, or only the person wronged?

The garments named

The two words mean different things. The tunic is the inner garment, next to the body. The cloak is the outer coat. Israel's law protected it, because a poor man slept in it.

Under the law it was forbidden to take as a pledge a poor debtor's cloak overnight. The debtor had to have his cloak returned so that he might have a covering for the night (Ex. 22:26; Deut. 24:12-13). This is probably what the Lord Jesus was referring to. He instructs His disciples not to resist and to give even more than the other man demands. This is grace.

Modernised from Arend RemmersOriginal wording

So the surrender Jesus asks for is the one thing the law itself would have handed back.

More than righteous

The old rule was just. Jesus does not tighten it. He brings in something different.

Under the old economy the law laid down the principle, in righteousness, "An eye for an eye" (Ex. 21:24), thereby restraining the wrath of man. Otherwise he would have demanded two eyes for one, in vengeance. But here an entirely new principle comes in... It is the very opposite of nature, which loves to avenge itself. It is different from righteousness, which measures out even-handed justice. It is the beautiful spirit of grace... the disciple should be more than righteous: he should be gracious. As he walks through this world, it is better to lose his cloak than to give up those lovely principles of grace. They mark him out as one who belongs to Christ.

Modernised from Messiah, PrinceOriginal wording

Only your own case

This is often read as though Jesus were dismantling courts and law enforcement. Commentators are careful here: the verbs are all personal.

Nothing here assumes that law is abolished, or its penalties. The government of the world is not in question, but the path of disciples in it... We may still turn the left cheek to the man who strikes the right. We may let the man who sues us have the cloak as well as the coat he has gained by fraud. That is clearly within our rights. If the cause were another person's, we would have no such right. We have no right to help people escape justice or treat it lightly. The Lord could never lay down a general rule that His people should allow lawlessness. He would never have them share in an indifference to the rights of others. He speaks only of what is personal to you — "strikes you," "sues you," "forces you."

Modernised from Numerical Bible NotesOriginal wording

You may give away your own coat. You may not give away someone else's protection.

Christ's own example

One objection comes from the trial of Jesus Himself.

Some pare down and whittle away His words. They are not ashamed to argue that He did not mean them literally. Their reason: when He was struck on the face for His answer to the high priest, He protested calmly, while bowing to the insult. Was this paying evil back in its own coin? On the contrary, it was One who did no sin, and no deceit was found in His mouth, who when reviled, did not revile in return, and when suffering, did not threaten. In fact He presented far more than the other cheek, for they spat in His face, and struck Him, and hit Him with the palms of their hands with the utmost contempt. No — the Lord yielded to wrong instead of resisting it; and such is the true calling of the Christian.

Modernised from William KellyOriginal wording

Why Luke reverses the order

Luke's version of this saying names the outer garment first, then the inner. The difference is deliberate, and it widens the teaching.

In the Gospel of Matthew the case is of one who sues at law... Luke, on the contrary, writes, "from one who takes away your cloak do not withhold your tunic either." It is not a case of legal suing, but of illegal violence... The apparent discrepancies of the Gospels are therefore their perfection, if indeed we value the entire truth of God... The Jewish disciple would especially need guarding on the side of law. But there is also violence in the world that breaks the law. The disciples needed to see this: it was their calling and privilege to hold fast their heavenly principles in the face of man's force, and not only in the face of law.

Modernised from William KellyOriginal wording

The exchange rate

Everything turns on what a coat is worth next to what you lose by clutching it.

How much better to lose one's clothes than consistency with Christ? The spirit of the instruction goes further than the one cheek or the outer coat. What men want is to escape all suffering and keep their human rights, in defiance of His words. So they lose the reality of Christianity, and they keep not even its appearance.

Modernised from William KellyOriginal wording

Summary

- Grace, not equity. "An eye for an eye" was righteous restraint; Jesus asks His disciples to be more than righteous — to be gracious.

- Grace gives more. The law itself told a creditor to return a poor man's cloak by nightfall. The disciple hands over even that.

- Grace is personal. The words are "sues you," "strikes you," "forces you." Forgive your own wrong. Never hand over another person's protection.

- Grace has a face. Christ offered more than the other cheek. He yielded to wrong instead of resisting it. That is the standard.

- Grace costs cloth. Losing a coat is cheap. Losing consistency with Christ leaves you without even the appearance of Christianity.

Matthew 5:41 · Darby

And whoever will compel thee to go one mile, go with him two.

Jesus is still answering the old rule of "an eye for an eye." This time the demand is legal: an official can claim your time and your feet, and the answer is to go twice as far.

The Word Behind "Forces"

The verb here is not about bullying. It is the language of official demand.

The word used for "compel" (Greek: angareuo) first meant to press someone into a service. This is how Simon of Cyrene was pressed into carrying the cross of the Lord Jesus. So even when a service is unwanted and unpleasant, the disciple should not only do it willingly, but do more than the job demands.

Modernised from Arend RemmersOriginal wording

A Sore Point Under Roman Rule

The demand was familiar, and people hated it.

The imperial government let its officials, while out on their errands, demand that a man come along in certain cases, and bring his pack animals too. How easily men are annoyed by what is, after all, no great burden! And none more so than a people like the Jews under their pagan rulers. The Lord would raise His disciples above all such self-will.

Modernised from William KellyOriginal wording

Not a New Measurement

The second mile is not a new limit to defend.

With what simplicity and force He gives His own a spirit that carries them in quiet dignity above the squabbles of the world! It would be unworthy of Him to hold to the letter and refuse to go four or five miles, if that was the demand, just because the Lord had said, "Go with him two miles." The real mind of the Lord is that the disciple should willingly go beyond what he was asked. It is grace in patience.

Modernised from William KellyOriginal wording

Beyond Justice

The old rule was not unfair. Jesus does not correct it. He asks for something higher than justice.

"An eye for an eye, and a tooth for a tooth" is perfectly righteous. But our Lord shows that we ought to be much more than righteous. We ought to be gracious, and He presses this as the high point of this part of His teaching... It is clear the Lord has no reference here to what governments have to do. The New Testament is written for the Christian... Personal injury is what is meant here. The evil done may be entirely undeserved, but it has to be overcome with good... The great principle our Lord marks here is this: according to the law you might go one step, but according to the gospel you would go two. This holds whether it is human violence, or the law applied however harshly or wrongly. Grace does twice as much as the law, whatever the point in hand.

Modernised from William KellyOriginal wording

There are three ways to meet a wrong, and only one of them is grace.

It is the very opposite of nature, which loves to avenge itself. It is different from righteousness, which measures out even-handed justice. It is the beautiful spirit of grace.

Modernised from Messiah, the PrinceOriginal wording

Christ Kept His Own Words

One objection points back to the Lord's own trial.

Some who would whittle away His words are not ashamed to argue that He did not mean them literally, because when He was struck on the face for His answer to the high priest, He calmly protested, while still bowing to the insult. Was this paying evil back in its own coin? On the contrary, He was One who did no sin, and no deceit was found in His mouth; when He was insulted, He did not insult in return, and when He suffered, He did not threaten. In fact He offered far more than the other cheek, for they spat in His face, and beat Him, and struck Him with the palms of their hands in utter contempt. No — the Lord yielded to wrong instead of resisting it; and that is the true calling of the Christian.

Modernised from William KellyOriginal wording

Where the Power Comes From

No one can do this by willpower. It takes a new life.

He saves by giving not only redemption, but a new and divine nature. That nature hates self-will, and loves and does God's will. So you obey under the law of liberty, not as the Jew did under the law of bondage.

Modernised from William KellyOriginal wording

Everyday Reach

The mile is gone. The principle is not.

Going the extra mile has a wide application. Someone may be very inconsiderate of our welfare or our feelings. How good it is if we can answer by being extra considerate of him! This is grace, in contrast to legality. In this we rightly represent the character of our blessed Lord.

Modernised from Leslie M. GrantOriginal wording

Summary

- Compelled — the word means an official demand for service, the very word used when Simon of Cyrene carried the cross.

- Grace — eye for eye was righteous; Christ asks His disciples for more than righteous. He asks for gracious.

- Beyond — the second mile is not a new limit but a direction; grace does twice what the law asks, and gladly more.

- Christ — He is the standard: He gave far more than the other cheek, and yielded to wrong instead of resisting it.

- Life — only a new nature makes this walk possible: it hates self-will, and obeys in liberty, not bondage.

Matthew 5:42 · Darby

To him that asks of thee give, and from him that desires to borrow of thee turn not away.

This verse closes the Lord's teaching on not repaying injury. It moves the disciple from enduring wrong to doing good. And it raises a question every honest reader feels: does Jesus mean I must hand over whatever anyone asks me for?

Where the Verse Sits

The command does not stand alone. It closes a run of sayings about being struck, sued, and forced to serve. One writer warns against softening it.

In this verse we have a great principle for the Christian. It comes at the close of the call not to resist evil, but to suffer it. The wrong may be private, or come through twisted uses of the law, or at public demand. Christ is the pattern for the disciple. No sound explanation can explain away His word, however unpleasant it is to human nature. The new nature stays loyal to it, as the perfect law of liberty. Only the selfish nature looks for a way out by every dishonest means.

Modernised from William KellyOriginal wording

Why can a disciple afford to be open-handed? Another writer points to who looks after him.

The disciples are under a higher government than any earthly one, and it will take abundant care of them. They no longer need to plead their own cause or take up arms in their own defence. And they share in such royal bounty that they are to be bountiful themselves.

Modernised from Numerical Bible NotesOriginal wording

Beyond What the Law Required

Why should a disciple give like this? Because of what he has already received, and in a measure far past what he ever requested.

He did not stop there, but told the disciple to give habitually to the one who asked. For what had he himself not received from the divine Giver, beyond everything he asked? He was the object of countless rich mercies — was he to turn away from someone who would ask or borrow?

Modernised from William KellyOriginal wording

Another writer notes that Israel's law already restrained hard dealing with a needy fellow Israelite, and that Jesus goes further still.

Even under the law the Jew could not lend anything to his brother at interest (Lev. 25:35ff; Deut. 23:19); rather, he was to open his hand wide to him (Deut. 15:7-8). The Lord Jesus here places no restrictions on giving and lending. For God, the great Giver, did not spare His own Son but delivered Him up for us all.

Modernised from Arend RemmersOriginal wording

Giving Like the God Who Gives

The measure is not the worth of the person in front of you. It is the character of God, seen in the Lord's own dealings with crowds who brought Him nothing.

I am not to ask questions about whether the person is worthy, and I need not give the amount he asks — but I am to give, because God gives. People brought their sick to the Lord, and having power and grace He healed them, requiring nothing, asking nothing. Many did not deserve it at all; yet He was the display of the giving God, and He gave freely.

Modernised from The Bible TreasuryOriginal wording

Whether It Means Giving Whatever Is Asked

Commentators differ in emphasis here. One insists that nobody may explain the Lord's word away. Another warns that a strictly literal reading misses the point.

This does not mean that we are to give everyone whatever he chooses to ask, or to lend whatever he wants to borrow. Rather, we must always be in a giving state — always ready to give, never tired of giving. Then, when a case of real need comes before us, we may enjoy the privilege of meeting it. So we are givers even as God Himself is a giver. This does not free us from the responsibility of our stewardship — from acting as God would have us act before Him, and for His glory.

Modernised from The Christian's FriendOriginal wording

Does that mean giving without thought? One writer says no.

Suppose someone came and asked you for something, and you had reason to think he would spend it wrongly — you must limit it. Why not? He might say to you, "Didn't the Lord command, 'Give to the one who begs from you'?" Certainly He did. But He has also given other words. By them I judge whether giving is right in each case. What the Lord has in view is real need.

Modernised from William KellyOriginal wording

The Snare of Being Taken Advantage Of

A single bad experience tends to close the hand for good. One writer meets that reflex head-on.

Do you count up how often you have been deceived? Even then, why feel bitter about it? The word of Jesus entitles you to give as to your Father. The person who receives your gift may put it to a bad use — that is his responsibility. I am bound to cultivate an unsuspicious generosity, and this quite apart from mere friendship.

Modernised from William KellyOriginal wording

Read as Addressed to You

The verse can be quoted in a self-serving direction, and one writer answers that trick with its own logic.

One man who professed faith said to me, "I ask because I want to give my brothers an opportunity to fulfil Matt. 5:42." I said, "Be consistent then. Go about hitting them, taking them to court, and forcing them to come at your bidding. That will give them the chance to fulfil the three previous verses." Let us make sure that when we read "Love," we love, and when we read "Give," we give. The one who yields everything gets everything; the one who keeps everything loses.

Modernised from VariousOriginal wording

Summary

- Received — God gave first and did not spare His own Son; the disciple gives out of what he received.

- Released — A higher government guards him. He need not defend himself, so his hands stay open.

- Ready — The command builds a settled readiness to give, not a duty to hand over whatever anyone asks.

- Real need — Judgement is right. The Lord has real need in view, not funding folly.

- Responsibility — If the receiver misuses your gift, that is his account, not yours. Stay generous without suspicion.

Matthew 5:43 · Darby

Ye have heard that it has been said, Thou shalt love thy neighbour and hate thine enemy.

The Lord takes up a saying His hearers had grown up with — and the second half of it is not in the law at all. Two questions follow: who counts as my neighbour, and where did the permission to hate come from?

The saying and its source

The first half of the quoted saying comes straight from Scripture. The second half, one writer argues, came from the human heart:

"It was said, You shall love your neighbour and hate your enemy." This last clause was a deduction, the inference of an evil nature. The law said, "Love your neighbour"; but there was no instruction to hate an enemy.

Modernised from The Bible TreasuryOriginal wording

Kelly traces where they drew it from. The Jews took it, he writes, from "the general tenor of the law," because God had once sanctioned the destruction of their enemies.

How "neighbour" was shrunk

One writer traces, step by step, how Jewish teaching narrowed the word "neighbour":

The question of the scribe in Luke 10:29, "And who is my neighbour?" shows that the Jews had restricted the meaning of this commandment. God intended them to see a neighbour in every fellow-man. They did not want that. They counted only their own people as their neighbours. In this way the Gentiles, the "uncircumcised," were excluded from their love. The strict scribes and Pharisees went even further. They did not want to count ordinary Jews as their neighbours. They considered them cursed because they did not know the law. Finally they excluded personal enemies from this commandment too. Only a very few "privileged" ones were left to be treated as "neighbours."

Modernised from Arend RemmersOriginal wording

A duty no lawgiver would write down

Notice what the human heart added: not a loophole, but a positive obligation. And notice how far the Lord's reply goes past merely being civil:

Men understand, at least, that they ought to love their neighbour: but their qualifications narrow even their idea of such a duty, while they have invented a duty of hate, which no lawgiver would perhaps dare to write on his tables, but which is nevertheless obeyed all too readily in practice. "You shall love your neighbour and hate your enemy" is what a man would justify to his conscience, as he approves it in his heart. But the law has no other word than "neighbour" here, as it has no other duty than to love him; and the Lord specifically puts even our enemies into this class. "But I say to you, Love your enemies" — not merely do them good, though that might seem much, but "love them."

Modernised from Numerical Bible NotesOriginal wording

The love the Lord asks for

The command is not about warm feelings towards people who hurt you. And the law itself already pointed this way:

But the Jews deliberately overlooked something. In the law God had also commanded them to love their enemies (see Exodus 23:4-5; Leviticus 19:33-34)... the Lord Jesus does not give His disciples new commandments. He judges the fleshly narrowing of the old commandment, and the human addition to it. In God's thoughts, every person we have dealings with is our neighbour. That holds even if he or she turns out to be our personal enemy. The Lord Jesus does not demand an emotional love or a friendly affection for enemies. He demands the much higher divine love.

Modernised from Arend RemmersOriginal wording

Higher ground than the law ever held

The law kept certain nations at a distance for generations. What Christ asks stands on different ground:

To love our enemies, to pray for those who persecute us, is wholly above the law or the duty of a people in the flesh. An Edomite or an Egyptian was not to be despised. Their children could enter the congregation of the Lord in the third generation. An Ammonite or a Moabite could only enter in the tenth. But Christ brought in grace and truth... As He came to seek and to save the lost, those who were His were to love their enemies and pray for their persecutors.

Modernised from William KellyOriginal wording

The test this puts on the heart

This verse asks more than what a person may do. It asks what he keeps in his heart:

Here was a thing that the law never could teach — it is grace. In a thousand practical instances, the question is not whether the thing is right. We often hear Christians asking, Is such a thing wrong? But this is not the only question for the Christian. Suppose wrong is done to him; what is he to feel then? If there is enmity towards him in another, what is he to cherish in his own heart?

Modernised from William KellyOriginal wording

Family likeness, not family entrance

The promised outcome — being sons of the Father — is not a wage earned by loving well:

It is a question of moral conformity or suitability to the character and ways of our Father. In everyday life we sometimes hear the saying, "You would not be your father's son if you acted like that." It is as though our Lord had said, "If you want to be the sons of your heavenly Father, you must act in grace to all; for that is what He is doing."

Modernised from C. H. MackintoshOriginal wording

Summary

- Half-quoted. The love command is Scripture. The hate clause is not — one writer calls it a deduction of an evil nature.

- Half-defined. "Neighbour" shrank from every fellow-man down to a privileged few. In God's thoughts it covers every person we deal with, even a personal enemy.

- Half-hearted. The law itself commanded Israel to love their enemies, and they overlooked it. Christ asks for divine love, not a friendly feeling.

- Whole grace. This stands above what the law asked of a people in the flesh. It is what Christ brought in when He came to seek and save the lost.

- Whole likeness. Acting in grace to all does not earn sonship; it shows whose children you already are, because grace to all is what the Father is doing.

Matthew 5:44 · Darby

But *I* say unto you, Love your enemies, [bless those who curse you,] do good to those who hate you, and pray for those who [insult you and] persecute you,

Jesus takes a saying His hearers knew by heart and turns it inside out. Instead of marking off who deserves love, He points to the two hardest people to love: the enemy and the persecutor.

The saying He corrects

The command to love your neighbour comes from the law, but the words attached to it here do not. Commentators point out that religious teachers added the second half themselves:

The rabbis first narrowed the word "neighbour" wrongly. Then they went further. If you must love your neighbour, they said, you must hate your enemies — and by "enemies" they meant everyone else: the other nations, Jews without religious training, and personal enemies too... Love fulfils the law, as Romans 13:10 says. Out of that command they had made its exact opposite. You only had to love the few who shared your views. Everyone else you could meet with pride, contempt and hatred.

Modernised from Arend RemmersOriginal wording

Higher ground than the law

Loving an enemy is not a harder version of law-keeping. Christ asks for something the law never asked for:

To love our enemies and to pray for those who persecute us is far above the law, and far above what the law asked of people in their natural state... But Christ brought in grace and truth. In the light of the Son of Man all were lost, even the sheep of Israel. He came to seek and to save the lost, so those who belonged to Him were to love their enemies and pray for those who persecuted them. It was the mind of heaven for His saints on earth.

Modernised from William KellyOriginal wording

What this love is

This love is not a warm feeling towards someone who hurts you. It is an active interest in their real good, and their hostility is the very reason to care:

Love is not just a kind feeling. It is real concern for another person's true welfare. If that person returns hatred, that is all the more reason to care for him, because he needs special help. When you return good for evil, you represent God rightly. You also set an example that should reach the hearts and consciences of others.

Modernised from Leslie M. GrantOriginal wording

Goodness that works inside evil

This is not justice, and it is not just staying clean of evil. It is good sent out into a hostile place:

He takes up the principle of the law, which deals with evil in order to hold it down... Then He brings in a vast principle, made known when Christ came into the middle of evil: good that is entirely above evil, yet acts inside it... It is not righteousness, in the sense of justice; it is not what presents us to God... it is goodness in the middle of evil.

Modernised from J. N. DarbyOriginal wording

The one who did it first

The command is not a theory. Christ Himself prayed for the men who were killing Him:

The Lord Jesus showed this love of God to us. "But God shows His love for us in that while we were still sinners, Christ died for us" (Romans 5:8). While He hung on the cross He prayed for His tormentors: "Father, forgive them, for they know not what they do" (Luke 23:34). So the Lord Himself is the perfect example of the command He gave.

Modernised from Arend RemmersOriginal wording

Sons showing the family likeness

The verse links this behaviour to being sons of the Father. Writers stress that the point is family likeness, not how someone becomes God's child:

When it is a question of "sons" it refers to our position... while here it is a question of character... God calls us to have the family character and to show the same grace, as sons of such a Father. The person who loves his enemies and does good to those who hate him shows the character of a son. His Father makes His sun rise on the evil and on the good. Think how people treat Him and blaspheme His name... Yet He still treats them this way, and He is "your Father."

Modernised from The Bible TreasuryOriginal wording

Why it is not out of reach

These words sound beyond anyone's reach. Commentators answer that the command still stands, and that God supplies what it asks for:

If we are His sons, it is not arrogance to hold feelings higher than human nature can reach. This is our new standing, and it should be our delight. Grace alone can make it real. But Christ has obtained everything we need for this. The Holy Spirit is here to see it through and to guide us to Christ's glory.

Modernised from William KellyOriginal wording

Summary

- Distortion. "Hate your enemy" was never God's word. Religious teachers added it, shrinking the circle of "neighbour" until it held only a favoured few.

- Elevation. Loving enemies and praying for persecutors stands above the law. It is the mind of heaven, brought down to earth by Christ.

- Definition. This love means caring about someone's real welfare. Their hostility becomes the reason to care, not a reason to stop. It is goodness working inside evil, not justice measured out.

- Pattern. The Father makes His sun rise on evil and good alike. The Son prayed for the men crucifying Him. The command asks only for the family likeness.

- Power. The standard is not lowered for us. Grace alone makes it work. Christ has secured all we need, and the Holy Spirit is here to carry it through.