Matthew 5:17–20
What does Jesus mean by “fulfill the law”?
Jesus says he did not come to abolish the Law and the Prophets—yet Christians do not apply every Old Testament command in the same way. The question is not whether Jesus takes Scripture seriously, but how his coming changes the way it is read and lived.
Read Matthew 5:17–20
17“Don’t think that I came to destroy the law or the prophets. I didn’t come to destroy, but to fulfill.
18For most certainly, I tell you, until heaven and earth pass away, not even one smallest letter or one tiny pen stroke shall in any way pass away from the law, until all things are accomplished.
19Therefore, whoever shall break one of these least commandments and teach others to do so, shall be called least in the Kingdom of Heaven; but whoever shall do and teach them shall be called great in the Kingdom of Heaven.
20For I tell you that unless your righteousness exceeds that of the scribes and Pharisees, there is no way you will enter into the Kingdom of Heaven.
World English Bible (WEB), public domain.
What Jesus is saying
Jesus is not canceling Israel’s Scriptures. He is claiming that the Law and the Prophets reach their intended goal in him—in his teaching, his mission, and the kind of righteousness he forms in his followers.
That is why the rest of Matthew 5 neither simply repeats earlier commands nor dismisses them. Jesus moves from murder to anger and reconciliation, from adultery to desire, from oath-taking to truthful speech, and from limited retaliation to enemy-love. He treats the commands as pointing beyond minimum compliance toward a transformed life.
Christians broadly agree that the Old Testament must be read in light of Jesus. They differ over how individual commands continue to apply, but “fulfill” cannot honestly mean either “the Old Testament no longer matters” or “nothing changes after Jesus.”
Why readers get stuck here
The tension is obvious. Jesus says not even the smallest part of the law will disappear, warns against setting aside commandments, and then speaks with striking authority: “You have heard … but I tell you.” Later New Testament writings also treat some practices—circumcision, food laws, sacrifices, and calendar observances—differently for followers of Jesus.
A good reading has to account for both sides: Jesus’ forceful affirmation of Scripture and the real transformation that follows from his life, death, resurrection, and new-covenant mission.
How the Sermon on the Mount frames it
Matthew places these verses immediately before six examples in 5:21–48. That placement matters. Verses 17–20 are not an isolated slogan about the Bible; they introduce the way Jesus reads and teaches it.
In each example, Jesus refuses a merely external standard. The issue is not only whether a person avoids murder, adultery, false oaths, or revenge. The issue is anger, desire, integrity, reconciliation, generosity, and love. The “greater righteousness” of verse 20 is therefore not presented as more elaborate rule-keeping, but as a life brought into alignment with the purpose of God’s commands.
Why Christians do not apply every command in the same way
The New Testament does not give one simple sorting chart, but it repeatedly reads Israel’s law through Jesus and the new covenant. Sacrifices are interpreted through Jesus’ once-for-all work. Circumcision is not required of Gentile believers. Food and purity practices are reconsidered. Commands concerning justice, faithfulness, love of God, and love of neighbor remain central and are often intensified rather than relaxed.
Some Christian traditions describe this using moral, ceremonial, and civil categories. Others avoid those later labels and ask how each command is taken up, transformed, or completed in Christ and the apostolic writings. The methods differ, but both are attempts to take Jesus’ affirmation and fulfillment of Scripture seriously.
Where Christians agree—and where they differ
Broad agreement
Jesus does not portray the Old Testament as a mistake to be discarded. Its story, promises, worship, ethics, and hopes are essential for understanding who he is and what he came to do.
A moral, ceremonial, and civil framework
Many Catholic and Protestant interpreters distinguish enduring moral commands from ceremonial and civil provisions tied to Israel’s covenant life. They differ over the details, but use the distinction to explain both continuity and change.
Catholic and Orthodox emphases
Catholic and Orthodox traditions do not frame every part of this question in the same way, but both emphasize a law fulfilled and transformed in Christ and lived through grace, the Spirit, the church, and the virtues. Neither treats salvation as self-earned or the Old Testament as disposable.
These summaries mark major points of emphasis; they do not exhaust every view within or beyond these traditions.
What this passage does not mean
It does not mean that Christians may ignore the Old Testament, and it does not mean that every command given to ancient Israel applies unchanged to every Christian community. Jesus’ claim is larger than either shortcut: Scripture reaches its intended goal in him, and his followers must learn to read it from that center.
Passages worth comparing
What still does not make sense in Matthew 5:17–20?
Open the passage with this question ready, then ask what still does not make sense.