First thing first: I want to ask you, why Jesus is not of the order of Aaron? Same question as here: Hebrews 7:11. This question is absolutely crucial to your understanding being proposed.
Yes, because it is holy. The question is not, is the law holy? The question is, are we? And the answer is a resounding, no! We know we are not holy precisely because the law is holy. That is the purpose of the law: to stop every mouth from boasting in the law: Romans 3:19. Notice that whatever the law says, it says to them under the law. The law does not say anything to them that are under grace.
The purpose of law is to execute wrath on them who would otherwise break it without conscience. Do you, personally, need to be commanded to 'do no murder'? Hopefully you do not. Tell me why you do not need some exterior force commanding you to 'do no murder, or else you will suffer the consequences of the law': why are you a "law unto yourself" in regards to murder? Do you need a police officer watching you to ensure you don't break into your neighbor's house, throttle him to near death, then steal his belongings? No? Why not? Why do you not need to be 'under the watch of the law' in these cases? What is in you that is "writing the law on your heart"? Now, you answer that and you'll answer why you aren't under the law anymore, unless you intentionally go back to being under it. That is called "drawing back to perdition" and "falling from grace" and there remains "no more sacrifice" under the law of Moses, and order of Aaron. Going back under the law is placing yourself back into condemnation and wrath for which there is no more sacrifice. You are removing from out of the order of Melchisedec and backward into the order of Aaron where only death, wrath, corruption and condemnation are the curse of the law. This is why Jesus says "Depart from Me, you cursed; I never knew you" because they never knew His sufficient grace. They counted His grace as insufficient, and lacking, and needing them to add their own works of the law to it; profaning it.
Yes, the Word/Torah is eternal. Jesus was the living, walking Torah. He showed us how we can fulfill the law by the Spirit. Make note of what happened to the living, walking Torah. Died in the flesh, raised in the Spirit. That is the sign: death in the letter, life in the Spirit: Romans 7:6. All of the law is fulfilled in "love your neighbor": Romans 13:8, Galatians 5:14, James 2:8
Those who "hate their brother" are those for whom the law is intended, and for whom it was delivered: 1 Timothy 1:9, 1 John 2:9: the law was not made for those who love their neighbor. A person that has unfeigned love for others has transitioned out from needing to be under the law, and into the grace of liberty; he has passed from "death to life": 1 John 3:14. Being in a state of liberty from the law, even though we sin, that sin is not imputed (neither can it be, as there is no condemnation apart from the law) because the heart is in the right place; which is why the Gentiles who didn't have the letter of the Torah still fulfilled the Spirit of the Torah, written in their hearts: Romans 2:14-15.
It is clear, and I completely agree.
The Torah is eternal, it is always there, it has not "passed away": but the one under grace is not under the law any longer. Of what order is your high priest? Aaron, or, Melchizedek? If you are under the law, then the High Priest of the order of Melchizedek cannot be your high priest, and does not know you as one of His order.
1 Corinthians 9:19 For though I be free from all men, yet have I made myself servant unto all, that I might gain the more.
20 And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law;
21 To them that are without law, as without law, (being not without law to God, but under the law to Christ,) that I might gain them that are without law.
22 To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some.
