Not to be argumentative, but says who? Who says it’s speaking about the Millennium? It’s a rest from works and trying to merit Gods favor. Jesus said it is finished from the cross.
Then why commission the church to preach the gospel? Why should He return? Why should there be a 1000 year reign of Christ? and why should there be a Great White Throne Judgment if all was finished at the cross? It's all over and you and I missed it. So has everyone else that has lived since that moment.
What really was finished was prophesied by Daniel...
Dan 9:24 Seventy weeks are determined upon thy people and upon thy holy city,
to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.
Now all is not finished and that is easily provable from the same book. If vision and prophecy were sealed up (finished) then where does this fit in?
Dan 12:8 And I heard, but I understood not: then said I, O my Lord, what shall be the end of these things?
Dan 12:9 And he said, Go thy way, Daniel: for the words are closed up and sealed till the time of the end.
Dan 12:10 Many shall be purified, and made white, and tried; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand.
Dan 12:11 And from the time that the daily sacrifice shall be taken away, and the abomination that maketh desolate set up, there shall be a thousand two hundred and ninety days.
Dan 12:12 Blessed is he that waiteth, and cometh to the thousand three hundred and five and thirty days.
Dan 12:13 But go thou thy way till the end be: for thou shalt rest, and stand in thy lot at the end of the days.
What do you think he meant? God’s wrath and been fully poured out the debt of sin had been paid, the law becomes powerless to those in Christ, to those outside it drives them to the cross.
Oh, so the Law is powerless? So one that commits adultery or lies, no longer needs the sacrifice of Christ because the Law is powerless?
You sure about that? Paul wasn't...
Rom 7:1 Know ye not, brethren, (for I speak to them that know the law,) how that the law hath dominion over a man as long as he liveth?
Rom 7:2 For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband.
Rom 7:3 So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
Rom 7:4 Wherefore, my brethren, ye also are become dead to the law by the body of Christ; that ye should be married to another, even to him who is raised from the dead, that we should bring forth fruit unto God.
Rom 7:5 For when we were in the flesh, the motions of sins, which were by the law, did work in our members to bring forth fruit unto death.
Notice here who becomes dead to what. The Law does not become dead to those in Christ, we become dead to the Law.
Rom 7:6 But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not in the oldness of the letter.
Rom 7:7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
Rom 7:8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.
Rom 7:9 For I was alive without the law once: but when the commandment came, sin revived, and I died.
Rom 7:10 And the commandment, which was ordained to life, I found to be unto death.
Rom 7:11
For sin, taking occasion by the commandment, deceived me, and by it slew me.
The real culprit here is us...
Rom 7:14 For we know that the law is spiritual: but I am carnal, sold under sin.
Rom 7:15 For that which I do I allow not: for what I would, that do I not; but what I hate, that do I.
Rom 7:16 If then I do that which I would not, I consent unto the law that it is good.
Rom 7:17 Now then it is no more I that do it, but sin that dwelleth in me.
Rom 7:18 For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
Rom 7:19 For the good that I would I do not: but the evil which I would not, that I do.
Rom 7:20 Now if I do that I would not, it is no more I that do it, but sin that dwelleth in me.
Rom 7:21 I find then a law, that, when I would do good, evil is present with me.
Rom 7:22 For I delight in the law of God after the inward man:
Rom 7:23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
Rom 7:24 O wretched man that I am! who shall deliver me from the body of this death?
Rom 7:25 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
We still do those things which bring death, we sin...
1Jn 1:8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.
1Jn 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
1Jn 1:10 If we say that we have not sinned, we make him a liar, and his word is not in us.
And sin results in death...
Rom 6:23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
but God gives us eternal life because Christ paid the price for our sins, He did not do away with the Law, He paid the penalty the Law enacts.