I believe Jesus is the word and was the fulfilling of the law
Yes, Jesus did fulfill the Law, (1) He kept the Moral Law, because He was without Sin, He did not do this, so we would not have to. He showed us How to keep the Law (2) He fulfilled the Ceremonial Laws, the type and shadow of His coming and sacrifice of the Sanctuary system. which He nailed to the Cross because He was the Lamb of God, not the Moral Law.
The Lord came to expand the meaning of the Moral Law, if you look further down the verse.
17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill. This does not mean "end" means to fill it up - expand
Go down further Jesus explains:
27 Ye have heard that it was said by them of old time, Thou shalt not commit adultery:
28 But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.
This is an expansion of the Law, for our understanding where Sin begins. In the Heart.
Isaiah prophesied when the Lord comes:
Isaiah 42:21 The LORD is well pleased for his righteousness' sake; he will magnify the law, and make it Honorable
So how did the Lord, put away the Law, the 10 Commandments - He didn't He came to expand them - and Make them Honorable.
Romans 3:31 Do we then make void the law through faith? God forbid: yea, we establish the law.
You see, as Christians we are to establish the law and make it Honorable, by keeping it by faith, by the Lords power to do so. All 10 of them.
Why? Romans 8:4 That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.
What Spirit - Ezek 36:26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.
27 And I will put my spirit within you[Holy Spirit], and cause you to walk in my statutes, and ye shall keep my judgments, and do them. According to the Word of God, the spirit of God is going to give you the power to Obey the Commandment by faith - of proof of faith that you are a child of the Living God.
28And ye shall dwell in the land that I gave to your fathers; and ye shall be my people, and I will be your God.
Sin produces bondage, if we are under the Law or under condemnation because of sin, the Lord frees us from the letter of the Law, judgment - because the wages of sin is death, gives us new life thought the Spirit of God, to save us from sin, and the power to keep from sin.
The only definition of Sin, is found in 1 John 3:4 for sin is the transgression of the Law.
If we are in the Spirit of the Lord, we walk in the Law, the Law of Liberty. We keep the Law by faith, because we love the Lord who freed us from the bondage of Sin and Death. Obedience is the fruit of faith in God in us. Galations 2:20