Be Ye Therefore Perfect: What Jesus Meant in Matthew 5:48

Be Ye Therefore Perfect

What Jesus Meant in Matthew 5:48 — and What He Did Not

"Be ye therefore perfect, even as your Father which is in heaven is perfect."

— Matthew 5:48

The Verse That Stops People Cold

Very few verses in Scripture land as heavily as this one.

A new believer reads the Sermon on the Mount, works through the Beatitudes, follows the hard sayings about anger and lust and oaths and enemies — and then arrives at Matthew 5:48. And the floor gives way. Perfect? As God is perfect? If that is the entrance requirement, no one is getting in.

The reaction is understandable. It is also, in a sense, exactly what Jesus intended. But it is not where He meant for us to stop.

Two other passages seem to stand in direct contradiction to this command, and holding all three together is the key that unlocks the whole thing:

"For all have sinned, and come short of the glory of God;"

— Romans 3:23

"I am the Almighty God; walk before me, and be thou perfect."

— Genesis 17:1

Romans says no one is perfect. Genesis and Matthew both command perfection. If we take all three at face value, God appears to be demanding something He has already declared impossible.

He is not. The apparent contradiction dissolves the moment we ask a question most readers never think to ask: are these three verses even using the same word?

They are not.

Part One: Three Verses, Three Different Words

Genesis 17:1 — tamim (תָּמִים)

The Hebrew word translated perfect in Genesis 17:1 is tamim. It does not mean "flawless." It means whole, sound, complete, unblemished — having integrity.

It is, above all, a sacrificial word. When the law describes the animal fit for the altar, this is the word it reaches for:

"Your lamb shall be without blemish, a male of the first year."

— Exodus 12:5

"If his offering be a burnt sacrifice of the herd, let him offer a male without blemish."

— Leviticus 1:3

The lamb is not morally sinless. It is unmaimed. Nothing is missing. Nothing is broken. It is all there.

Now watch how Scripture uses the same word of men:

"Noah was a just man and perfect in his generations, and Noah walked with God."

— Genesis 6:9

"That man was perfect and upright, and one that feared God, and eschewed evil."

— Job 1:1

Noah was tamim — and Noah got drunk and lay uncovered in his tent (Genesis 9:21). Job was tamim — and Job spent thirty chapters demanding that God answer for Himself, and repented in dust and ashes for it (Job 42:6). Neither man was sinless. Both men were whole. Their lives were not divided. They were not half-committed. There was no missing piece.

That is what God says to Abram: walk before me, and be thou whole.

Matthew 5:48 — teleios (τέλειος)

The Greek word in Matthew 5:48 is teleios, built on the root telos — meaning end, goal, purpose, completion.

Something is teleios when it fully answers the purpose it was made for. A ripe fruit is teleios. A grown man, as opposed to a child, is teleios (1 Corinthians 14:20; Ephesians 4:13). A finished work is teleios.

The word is not primarily about the absence of flaws. It is about the presence of the whole. It is maturity and completeness, not sinlessness.

Notice the overlap with the Hebrew. Tamim and teleios are aiming at the same target from two languages: undivided wholeness. In fact, when the Jewish translators produced the Septuagint (the Greek Old Testament that the New Testament writers knew and quoted), they frequently rendered tamim with words in this same family. The concepts are cousins.

Romans 3:23 — the courtroom

Romans 3:23 is doing something completely different.

"For all have sinned, and come short of the glory of God;"

— Romans 3:23

The two verbs are worth pausing over. "Have sinned" is a Greek aorist — a settled, finished fact, the whole race summed up in a single act. "Come short" is a present tense — an ongoing, continuous falling short, happening right now, without pause.

And what is the standard? Not maturity. Not wholeness. The glory of God. Paul is not measuring us against a walk; he is measuring us against deity itself. That is a bar no creature can clear, and Paul knows it. Romans 3 is a courtroom. It is not describing the Christian walk at all — it is delivering a verdict on the human race.

So the "contradiction" was never a contradiction. Genesis and Matthew call for a whole and undivided walk. Romans announces our legal bankruptcy before the glory of God. These are two different measurements, taken with two different rulers, for two entirely different purposes.

Part Two: What Matthew 5:48 Actually Says in Context

Matthew 5:48 is not a free-floating maxim. It is the capstone of a paragraph, and it is bolted to that paragraph by one small, easily-skipped word: "therefore."

"Be ye therefore perfect..."

— Matthew 5:48

The Greek is oun — a word of consequence. It means this follows from what I just said. So we must ask: what did He just say?

"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, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust. For if ye love them which love you, what reward have ye? do not even the publicans the same? And if ye salute your brethren only, what do ye more than others? do not even the publicans so?"

— Matthew 5:43-47

The whole passage is about the scope of love.

The publican loves — but he loves only those who love him back. His love is real, but it is partial. It has a boundary drawn around it. It stops at the edge of his own circle.

God's love has no such boundary. He sends His sun on the evil and the good. His rain falls on the just and the unjust. His love is not partial. It is whole. It is tamim. It is teleios.

"Be ye therefore perfect, even as your Father which is in heaven is perfect."

— Matthew 5:48

Be whole in your love, as your Father is whole in His. Do not draw a line around your mercy and love only the people inside it. That is what Jesus is saying.

And if there is any lingering doubt, Luke settles it. Luke records the same sermon and renders the same climactic line this way:

"Be ye therefore merciful, as your Father also is merciful."

— Luke 6:36

Luke understood teleios here to mean undivided mercy. Not sinless perfection. Two Gospel writers, one sermon, one meaning.

Part Three: The Order Matters — Command Always Follows Grace

Here is the point that most readers miss, and it is decisive.

In both Genesis and Matthew, the command to be perfect is given to people who have already been declared righteous.

Abram was justified in Genesis 15 — two chapters before Genesis 17

"And he believed in the LORD; and he counted it to him for righteousness."

— Genesis 15:6

That is Abram's justification. It happens by faith, before he is circumcised, before he does one single work of obedience. Paul builds nearly the whole of Romans 4 on this precise sequence, and he hammers the timing:

"How was it then reckoned? when he was in circumcision, or in uncircumcision? Not in circumcision, but in uncircumcision."

— Romans 4:10

Only afterward, in Genesis 17, does God say: "walk before me, and be thou perfect."

So the command is not the price of righteousness. It is the walk of a man who has already been counted righteous. God did not say, "Be perfect, and then I will accept you." He said, "I have accepted you — now walk whole before me."

The same order governs the Sermon on the Mount

Matthew 5 does not open with commands. It opens with the Beatitudes — and the very first one is:

"Blessed are the poor in spirit: for theirs is the kingdom of heaven."

— Matthew 5:3

Spiritual bankruptcy. Empty hands. Nothing to offer. That is the doorway into the kingdom, and Jesus puts it first, before He asks for anything at all.

"Blessed are they which do hunger and thirst after righteousness: for they shall be filled."

— Matthew 5:6

The hungry do not bring righteousness. They are filled with it.

The gift comes first. The ethic comes second. This is the unbreakable pattern of all Scripture: the indicative before the imperative. Here is who you are — now walk like it. Never the reverse.

Part Four: But the Standard Is Still Absolute — and That Is on Purpose

None of this softens the command. Jesus is not lowering the bar. He is raising it far higher than the Pharisees ever dreamed:

"For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven."

— Matthew 5:20

The scribes had built a religion of the exterior. Jesus drives the law straight through the surface into the heart. You have not murdered? You have been angry — that is murder's root (5:22). You have not committed adultery? You have looked with lust — that is adultery's root (5:28). The law was never about the hands. It was always about the heart, and no man's heart survives that inspection.

Why would Jesus do this? Paul tells us plainly:

"Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin."

— Romans 3:20

"Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith."

— Galatians 3:24

The law is a mirror, not a ladder. It was never given so that we could climb it. It was given so that we could see ourselves in it — and run to Christ.

So Matthew 5:48 and Romans 3:23 are not enemies. They are saying the same thing from opposite ends. Matthew shows you the standard. Romans shows you your failure to meet it. Both drive you to the same place: the cross.

Part Five: Paul Uses Both Meanings in a Single Breath

If the argument so far still feels like a scholar's distinction, Philippians 3 removes all doubt. Paul both denies and claims perfection within four verses:

"Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus."

— Philippians 3:12

"Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before, I press toward the mark for the prize of the high calling of God in Christ Jesus."

— Philippians 3:13-14

"Let us therefore, as many as be perfect, be thus minded..."

— Philippians 3:15

In verse 12 Paul says he is not perfect. In verse 15 he includes himself among those who are perfect. Both times the word is from the same root.

He is not confused, and he is not contradicting himself. He means two different things, and he expects us to be able to tell them apart:

• Absolute perfection — not yet. He has not attained. He is still running.

• Mature, single-minded, undivided pursuit — yes. "This one thing I do." That is a whole man. That is teleios.

Paul is a man with one thing on his mind, running hard at a goal he has not yet reached. That is the perfection Matthew 5:48 commands.

Part Six: The Three Tenses of Perfection

Put it all together and Scripture speaks of the believer's perfection in three tenses. Nearly every confusion about this subject comes from collapsing them into one.

1. Positional — already finished

"For by one offering he hath perfected for ever them that are sanctified."

— Hebrews 10:14

"For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him."

— 2 Corinthians 5:21

This is done. It is not improving. Christ's righteousness is credited to your account, entire and complete, the moment you believe. Before God's judgment seat, the believer is already as perfect as he will ever be — because the perfection in question is Christ's, not his own.

2. Progressive — happening now

"Walk before me, and be thou perfect."

— Genesis 17:1

"Be ye therefore perfect."

— Matthew 5:48

"But let patience have her perfect work, that ye may be perfect and entire, wanting nothing."

— James 1:4

This is the walk. It is uneven, it is contested, and it is real. This is where Matthew 5:48 lives — and it is where we spend our whole lives.

3. Ultimate — guaranteed, not yet arrived

"Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is."

— 1 John 3:2

The absolute perfection Matthew 5:48 holds up as the standard is genuinely coming. It just is not coming here, and it will not come by our effort. It comes when we see Him.

Romans 3:23 describes the man outside the first tense. Genesis 17:1 and Matthew 5:48 describe the walk of the man inside it, aimed at the third.

Part Seven: Two Ditches on Either Side of the Road

This doctrine has a ditch on the left and a ditch on the right, and Christians fall into both.

The ditch of sinless perfectionism

Some have taught that a believer can reach a state in this life where he no longer sins. Scripture closes that door and locks it:

"If we say that we have no sin, we deceive ourselves, and the truth is not in us."

— 1 John 1:8

And notice who John is writing to. Not unbelievers — "my little children" (1 John 2:1). The man who claims sinlessness has not achieved holiness; he has only achieved self-deception.

The ditch of "impossible, therefore ignore it"

The opposite error is more common and, frankly, more comfortable. Since I can never be perfect, the command must not really apply to me. So the standard is quietly set aside, and the Christian settles into a partial, publican-shaped love that goes exactly as far as his own circle and no further.

But Jesus did not say aspire to be perfect. He gave a command. The impossibility of absolute perfection does not excuse us from wholeness. Abram could not be sinless either — and God still said walk before me, and be thou perfect, and Abram walked.

The road between the ditches: you are perfect in Christ positionally, you are commanded to be whole practically, and you will be perfect actually when you see Him. All three at once. Drop any one of them and you land in a ditch.

Part Eight: So What Does This Ask of You?

Strip away the Greek and the Hebrew and the three tenses, and Matthew 5:48 asks one searching question:

Where have you drawn the boundary around your love?

Because you have drawn one. Everyone has. There is some person, or some kind of person, that your mercy simply does not reach — and you have made peace with that. Jesus points directly at that boundary line and says: the publicans have one of those too. What do ye more than others?

The Father's sun rises on the man who cursed Him this morning. His rain falls on the field of the man who denies He exists. There is no boundary on His mercy — none — and He is telling you, plainly, to be like Him in this.

That is teleios. Not flawlessness. Wholeness. A love with nothing missing from it.

Look again at the rich young ruler, who came to Jesus asking what good thing he must do:

"Jesus said unto him, If thou wilt be perfect, go and sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come and follow me."

— Matthew 19:21

Same word. Teleios. And what was actually wrong with that young man? Not that he had committed some flagrant sin — he claimed to have kept the commandments from his youth, and Jesus did not dispute it. His problem was that a piece of him was still held back. He was not whole. He went away sorrowful, and the thing he would not surrender is the thing he walked away holding.

That is the perfection Christ commands. Not a spotless record — you do not have one, you will not get one, and Christ has already provided His own in its place. What He asks for is all of you. Nothing held back. Nothing walled off. No boundary drawn around the mercy.

The lamb without blemish. The man with one thing on his mind. The love that will not stop at the edge of its own circle.

"Be ye therefore perfect, even as your Father which is in heaven is perfect."

— Matthew 5:48

Summary

Verse	Word	Meaning	What it is doing
Genesis 17:1	tamim (Heb.)	whole, sound, unblemished	Command to a man already justified (Gen 15:6)
Matthew 5:48	teleios (Gr.)	complete, mature, undivided	Command to those already in the kingdom (Matt 5:3)
Romans 3:23	hēmarton / hysterountai	sinned; falling short	Verdict against the whole race, measured by God's glory

• 1. The three verses use three different words with three different meanings. There is no contradiction.

• 2. Matthew 5:48's "therefore" ties it to the command to love enemies. Luke 6:36 confirms it: be merciful, as your Father is merciful.

• 3. In both Genesis and Matthew, the command follows justification. Grace first, always.

• 4. The standard is still absolute — deliberately so. It is a mirror to drive us to Christ, not a ladder to climb to God.

• 5. Philippians 3:12–15 proves the double sense: Paul is not yet perfect, and Paul is perfect.

• 6. Perfection is positional (done), progressive (now), and ultimate (coming).

• 7. What Christ commands is not flawlessness. It is wholeness — a love and a life with nothing held back.

Questions for Study

1. Read Matthew 5:43–48 straight through without stopping. What is the one subject of the whole paragraph? How does that shape verse 48?

2. Compare Genesis 15:6 with Genesis 17:1. Which comes first, and why does the order matter so much to Paul in Romans 4?

3. Read Philippians 3:12–15. How can Paul say he is not perfect and then include himself among the perfect? What does he mean each time?

4. Noah and Job are both called perfect, yet Scripture records the sins of both. What does this tell you about the word?

5. If you are already "perfected for ever" (Hebrews 10:14), why does God still command you to be perfect?

6. Honestly: where is the boundary line around your mercy? Who is on the far side of it?

Key Verses

Matthew 5:3, 5:6, 5:20, 5:43–48 · Luke 6:36 · Genesis 6:9; 15:6; 17:1 · Job 1:1 · Romans 3:20, 3:23; 4:10 · Galatians 3:24 · Philippians 3:12–15 · Hebrews 10:14 · 2 Corinthians 5:21 · 1 John 1:8; 3:2 · James 1:4 · Matthew 19:21