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. For truly I tell you, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished. Therefore anyone who sets aside one of the least of these commands and teaches others accordingly will be called least in the kingdom of heaven, but whoever practices and teaches these commands will be called great in the kingdom of heaven. For I tell you that unless your righteousness surpasses that of the Pharisees and the teachers of the law, you will certainly not enter the kingdom of heaven.
Matthew 5:17-20
This is a difficult passage. What are we to take from Jesus declaring that he fulfills the law?
In Jesus’ day, may believed that when the Messiah came that a new law would be established — the laws of the Old Testament would go away, and new rules would be established. Jesus is correcting that, simply stating that the prophecy points to him (he is fulfilling) and that he embodies the law. In the coming passages of Jesus’ sermon, he explains this thinking more specifically — for example, the OT says “do not murder”… and here is what that really means.
So this passage is part declaration: Jesus is the Messiah. It is also an introduction: just you all wait and see what the law really means.
There is an important application for us, in the context of our modern faith. We may have developed expectations about what the law of the scriptures is and what it means. But like Jesus did in his day, we need to recognize that Jesus is the completion of the law. We need to follow him. He will show us what the law really means.
Be God’s — every day.