Jesus Came to Fulfill the Law Matthew 5:17–20

In the Sermon on the Mount, Jesus makes a crucial declaration:

“Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them.”

Jesus did not come to make the Old Testament irrelevant.

He came to bring the Law and the Prophets to their intended fulfillment.

The Law revealed God’s will, and the Prophets pointed forward to the coming Messiah. The sacrifices, the temple, the priesthood, and many of Israel’s institutions ultimately pointed beyond themselves to Christ.

Jesus therefore came not merely as someone who obeyed the Law, but as the One in whom its purpose reaches fulfillment.

This does not mean that God’s commands can be treated lightly.

Jesus warns against setting aside even the least of God’s commands and teaching others to do the same.

True discipleship joins teaching with obedience.

We are not called merely to speak God’s Word. We are called to live under its authority.

Then Jesus gives an even more challenging statement:

“Unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.”

Jesus was not simply asking His disciples to keep more rules than the Pharisees.

The righteousness He describes goes deeper than external religious performance.

The Pharisees could appear righteous outwardly, but Jesus looks at the heart.

It is not enough to avoid murder while holding hatred and anger within.

It is not enough to avoid adultery outwardly while allowing sinful desire to rule the heart.

The righteousness of God’s Kingdom is not merely a greater quantity of religious behavior.

It is a righteousness that reaches the heart.

Yet this raises an important question: Who can possess such righteousness?

The answer takes us back to Jesus’ own words:

“I have come to fulfill.”

We have not perfectly fulfilled God’s Law.

Jesus has.

He obeyed the Father completely, bore the judgment our sin deserved on the cross, and fulfilled what the Law and the Prophets anticipated.

Through faith, we are united to Christ and receive a righteousness we could never produce on our own.

But grace does not leave us unchanged.

The Holy Spirit begins to transform our hearts so that we increasingly love what God loves and desire to obey Him.

Christian obedience, therefore, is not the price of salvation.

It is the fruit of salvation.

The heart of Matthew 5:17–20 is not, “Try harder than the Pharisees.”

It is Jesus’ declaration:

“I came to fulfill.”

Christ fulfills the Law for us, and then He forms in us a life of genuine, heart-deep obedience.

True righteousness begins with Christ and continues through the transforming work of His Spirit.