this is a very good catch. if i may say so. can you tell me what is the "my law" meaning there? does the bible ever answer this question? i think its important when you debate with hebrew roots people who use this to say "my law" means law of moses and all it contains.
At the risk of stating the obvious, I believe the following verses (with some deductive reasoning applied), provide a reasonable case as to the meaning of the "my law. The "my law" and the "law of God" I believe are synonymous - I think this association is appropriate because in Jerimah 31 it is God Himself speaking, while in Romans (below), Paul is speaking about God (of course with God moving him to do so).
Verse 7 (and the other like verses in the vicinity), by stating that the carnal mind "is not subject to the law of God", thereby identifies what the law of God is not. By identifying what it is not, the law of God can then be isolated and made visible. That law. I believe, is made known in verse 8:2 (and other like verses in the vicinity), which law, is Christ Himself.
BTW, it is early here and I've only had two cups of coffee thus far (so I could be wrong), but I believe verses quoted in the preceding post regarding Jerimiah, are actually in Jerimiah 31, not 30. No big deal just a typo I'm sure, but I thought I'd mention it in case someone else tries to read them.
[Rom 8:1-10 KJV]
1 [There is] therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit.
2
For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.
3 For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:
4 That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.
5 For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit.
6 For to be carnally minded [is] death; but to be spiritually minded [is] life and peace.
7 Because the carnal mind [is] enmity against God:
for it is not subject to the law of God, neither indeed can be.
8 So then they that are in the flesh cannot please God.
9 But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.
10 And if Christ [be] in you, the body [is] dead because of sin; but the Spirit [is] life because of righteousness.
The law of the Spirit of life in Christ Jesus is also referred to in the Bible as the law of liberty:
[Jas 1:25 KJV]
25 But whoso looketh into the perfect
law of liberty, and continueth [therein], he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
[Jas 2:12 KJV] 12 So speak ye, and so do, as they that shall be
judged by the law of liberty.
We can know the Mosaic Law is not God's law by a multitude of verses contained in the Bible. Notice in the following verses. that those who despised Moses' law were put to physical death, but those who violate the law of God are put to spiritual death: the second death. So, Moses' law applied only to this world, not the next world, but God's law applies to the next world, not this world.
[Heb 10:27-29 KJV]
27 But a certain
fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
28
He that despised Moses' law died without mercy under two or three witnesses:
29 Of
how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing,
and hath done despite unto the Spirit of grace?