In Matthew 5:17-20 Jesus makes it clear that he has come to fullil the Law and the Prophets, not JUSt the Law mind you, the Law and the Prophets.
Of course He doesn't mention what Law, the original 10 or the 600+ added on later by Man, of course that he mentiones Commandments makes one assume he means the big 10 and in Christ they have been fullfilled. Once a law and a prohetic vision has been fullfilled does it stop being applicable?
Well, one assumes that a prophecy, once fullfilled is no longer unfullfilled right, but a Law is more "complex", but Jesus does say that the
8 For truly, I say to you, till heaven and earth pass away, not an iota, not a dot, will pass from the law until all is accomplished.
But he also says that he has coem to do just that, accomplish/fullfill te Law, and then what doe she go on to say:
He goes on to expand and go beyond the law with:
21 “You have heard that it was said to the men of old, ‘You shall not kill; and whoever kills shall be liable to judgment.’ 22 But I say to you that every one who is angry with his brother shall be liable to judgment; whoever insults his brother shall be liable to the council, and whoever says, ‘You fool!’ shall be liable to the hell of fire.
27 “You have heard that it was said, ‘You shall not commit adultery.’ 28 But I say to you that every one who looks at a woman lustfully has already committed adultery with her in his heart.
31 “It was also said, ‘Whoever divorces his wife, let him give her a certificate of divorce.’ 32 But I say to you that every one who divorces his wife, except on the ground of unchastity, makes her an adulteress; and whoever marries a divorced woman commits adultery.
33 “Again you have heard that it was said to the men of old, ‘You shall not swear falsely, but shall perform to the Lord what you have sworn.’ 34 But I say to you, Do not swear at all, either by heaven, for it is the throne of God, 35 or by the earth, for it is his footstool, or by Jerusalem, for it is the city of the great King. 36 And do not swear by your head, for you cannot make one hair white or black. 37 Let what you say be simply ‘Yes’ or ‘No’; anything more than this comes from evil.
38 “You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ 39 But I say to you, Do not resist one who is evil. But if any one strikes you on the right cheek, turn to him the other also; 40 and if any one would sue you and take your coat, let him have your cloak as well; 41 and if any one forces you to go one mile, go with him two miles. 42 Give to him who begs from you, and do not refuse him who would borrow from you.
43 “You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’ 44 But I say to you, Love your enemies and pray for those who persecute you, 45 so that you may be sons of your Father who is in heaven; for he makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust. 46 For if you love those who love you, what reward have you? Do not even the tax collectors do the same? 47 And if you salute only your brethren, what more are you doing than others? Do not even the Gentiles do the same? 48 You, therefore, must be perfect, as your heavenly Father is perfect.
So what does that mean?
That Jesus fullfilled the Law and the prophecies of the OT and gave unto us a new revelation from them, a progressive revelation that was the TRUE Word of God, not filtered through Man, but direct from His Word.
But did It stop there?
Nope, to this day the Word of God reveals itself to Us via the Universe, via the HS, Via the Bible ( yes still) and via Love.