17 “Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill. 18 “For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished. 19 “Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven.
20 “For I say to you that unless your righteousness surpasses that of the scribes and Pharisees, you will not enter the kingdom of heaven.
Jesus here after stating the important truths concerning the kingdom of God,speaks to them about the law and the prophets.The law and the prophets included the mosaic law and all the prophetic writings of the old testament.Jesus states explicitly that he has not come to abolish the law and the prophets but to fulfill them.These teachings which he has started giving are not meant to abolish the law,but in themselves are the fulfilment of the law.Jesus has come to fulfill all the requirements of the mosaic law,this he perfectly did.He also came to fulfill all the prophesies that were made about him.
When believers in Christ live by these teachings of the sermon on the mount, they will fulfill the law and the prophets.For he shortens all the law and the prophets into one verse in matthew 7:12 and says “Do unto others,what you want others to do unto you;on this hangs all the law and the prophets.”
By living according to the teachings of Christ which are based on the law stated above, we will in no way miss fulfilling the requirements of God.
In gal 5 :20 -23 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness,gentleness and self control.Against such things there is no law.
Notice how the list ends.There is no law against the fruit of the spirit.The fruit of the spirit is the requirement of the law,so it fulfils the law.What the law tries to bring out is the same as the fruit of the spirit.It cannot bring it out.It can only inform.But the Holy spirit, enables and empowers and helps the believers to bring out the fruit of the Spirit.
That is how the law is fulfilled in a believer’s life.
Till the end of time all the laws of God stand.None of them can be annuled.Remember the crowd was Jewish,people to whom the law and the prophets were given.The time of the law and prophets was coming to an end and the time of the Gospel has come.Still the law and the prophets are not abolished but rather have been fulfilled by Jesus.
Wesley explains briefly how it applies to the life of the believer.
“For the law has its effect, when the rewards are given, and the punishments annexed to it inflicted, as well as when its precepts are obeyed” JohnWesley
He talks in terms of law and it’s effect i.e judgement ,rewrds and punishments which will be accorded at the end of time .Till then the law stands ,even though this heaven and earth will pass away.
Whoever obeys these laws of God and teaches them ,will be considered great in the kingdom of God.
Whoever annuls the laws of God ,even one and teaches others to do the same will be called least.So whoever does not obey the Law of God and teaches others also to take a deviant way from the law will be called least in the kingdom of God.Jesus goes on further and states that if the righteousness of anyone does not exceed the external traditionalism and the self righteousness of the pharisees, which is a result of adherence to a twisted interpretation of the law,which annuls the real law ,then ,they cannot enter the kingdom of God.
Adam clark explains the pharisaical system best.
“The Pharisees were remarkable for making a distinction between weightier and lighter matters in the law, and between what has been called, in a corrupt part of the Christian Church, mortal and venial sins.”
Jesus elsewhere staes that the pharisees annul the laws of God by their tradition.They observed the letter of the law without it’s spirit.The people never knew the problem with the religious system.
Jesus wants them to know the real way of being righteous.Jesus does not want us to be followers of a superficial religious system,to be like the pharisees.Jesus wants us to surpass the religious system with the true spirituality of the Gospel which can only make a person trulyright with God.Those who do not obey and teach others to disobey the laws of God,by wrongly interpreting it and applying it will be called least – cannot enter the kingdom of God.Adam clarke in his commentry explains it well.
“Except your righteousness shall exceed] perisseush, Unless your righteousness abound more-unless it take in, not only the letter, but the spirit and design of the moral and ritual precept; the one directing you how to walk so as to please God; the other pointing out Christ, the great Atonement, through and by which a sinner is enabled to do so- more than that of the scribes and Pharisees, who only attend to the letter of the law, and had indeed made even that of no effect by their traditions-ye shall not enter into the kingdom of heaven.”