How to Use This Commentary
Matthew 5:17–20 stands at the center of the Sermon on the Mount. Read it in four movements: (1) Christ’s relationship to the Law, (2) the permanence of Scripture, (3) the seriousness of obedience, (4) the righteousness required for the kingdom.
These verses anchor everything that follows. Before Jesus intensifies the Law in 5:21–48, He clarifies His authority over it.
Table of Contents
A Quick Look: Matthew 5:17–20
Big idea: Jesus did not abolish the Old Testament Law—He fulfilled it completely, upheld its authority, and revealed the true righteousness required for entrance into the kingdom.
The Law is not discarded. It is completed in Christ. And its deepest demand is not external compliance, but transformed righteousness.
Read the passage: Matthew 5:17–20
A Simple Explanation (Matthew 5:17–20)
5:17 — Fulfillment, not destruction.
Jesus denies that He came to tear down the Law or the Prophets.
He came to fulfill them—to complete their purpose and bring them to their intended goal.
5:18 — Every detail matters.
Not the smallest letter will pass away until all is accomplished.
Scripture is permanent and authoritative.
5:19 — Obedience matters.
Those who disregard God’s commands and teach others to do so diminish themselves.
Those who keep and teach them are called great in the kingdom.
5:20 — Righteousness must surpass the Pharisees.
External religion is insufficient.
Kingdom entrance requires a deeper, greater righteousness.
Jesus raises the standard instead of lowering it— and then shows that only God can provide what He requires.
A Deeper Look: Fulfillment, Authority, and True Righteousness
1) The Crisis of Authority
Human societies drift toward moral relativism when detached from divine revelation. When law is reduced to preference, righteousness becomes negotiable.
Jesus speaks into that crisis. He does not treat Scripture as evolving tradition. He treats it as fixed, binding, and divine.
The Law is not a human experiment. It is God’s revealed will.
2) “I Did Not Come to Abolish”
The word “abolish” carries the idea of dismantling or tearing down. Jesus rejects the accusation that He came to overthrow Moses.
His ministry did not contradict the Old Testament. It confirmed it.
Every promise, prophecy, type, and pattern pointed toward Him. The Law anticipated Him. The Prophets foretold Him. He is their fulfillment.
3) What “Fulfill” Means
Fulfillment does not mean cancellation. It means completion.
Jesus fulfilled the Law in multiple ways:
- He obeyed it perfectly.
- He embodied its righteousness.
- He satisfied its penalties.
- He completed its ceremonial shadows.
The sacrificial system pointed forward to His cross. The priesthood anticipated His mediation. The moral commands reflected His character.
In Him, the Law reaches its intended goal.
4) The Permanence of Scripture
Jesus intensifies His claim: not even the smallest letter will disappear until all is accomplished.
This affirms the precision and durability of divine revelation. Scripture is not temporary. It outlasts heaven and earth.
The authority of Christ and the authority of Scripture stand together. To accept one while dismissing the other is impossible.
5) The Seriousness of Obedience
Kingdom citizens do not treat God’s Word casually. Even the “least” command reflects God’s character.
To relax obedience is to misunderstand grace. Grace does not nullify righteousness; it produces it.
Obedience does not earn salvation. It reveals transformation.
6) Surpassing the Pharisees
The scribes and Pharisees were meticulous in external observance. Yet their righteousness was surface-level.
They measured holiness by visible acts. Jesus measures it by the heart.
Their righteousness was:
- External rather than internal
- Selective rather than whole
- Redefined to be manageable
- Driven by self-glory
Kingdom righteousness surpasses theirs because it is inward, Spirit-produced, and rooted in humility.
7) The Impossibility That Leads to Grace
When Jesus says that our righteousness must exceed that of the Pharisees, He confronts human self-confidence.
If their devotion was insufficient, who can stand?
The answer is not greater self-effort. It is divine righteousness given by faith.
The Law exposes sin. Christ supplies righteousness.
The King demands perfection— and then provides it.
Key Themes in Matthew 5:17–20
- Authority of Scripture — Every word stands until fulfilled.
- Christ as Fulfillment — The Law reaches completion in Him.
- Grace and Obedience — Grace empowers righteousness rather than abolishing it.
- Heart Righteousness — External religion is insufficient.
- Imputed Righteousness — Entrance into the kingdom requires righteousness given by God.
Frequently Asked Questions
Did Jesus abolish the Old Testament Law?
No. He fulfilled it. He completed its purpose, satisfied its penalties, and embodied its righteousness.
What does it mean that not one letter will pass away?
It means Scripture is enduring and authoritative down to its smallest detail. God’s Word stands until all His purposes are accomplished.
How can our righteousness surpass the Pharisees?
Not by greater rule-keeping, but by receiving the righteousness of Christ through faith and living by the Spirit from a transformed heart.
Bottom Line
Matthew 5:17–20 declares that Jesus is not the destroyer of Scripture but its fulfillment. The Law stands. Its demands are holy. Its righteousness is perfect. And only those who receive and reflect that righteousness will enter the kingdom of heaven.
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