Stuart, you still do not get it do you? In Romans Chapter 7 Paul is talking about the natural man walking in the flesh (carnal mind of sinful thoughts) that receives not the things of the Spirit of God neither can he know then because they are foolishness unto him. This is the place that God's Law brings all of is where we finally see ourselves as God sees us as sinners clothed in filthy rags in need of a Savior. (Romans 7:1-24) Paul then concludes Romans Chapter 7 by saying these words..........
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. (Romans 7:25)
then we continue straight away with........
Romans 8:1-13
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. 11, But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwells in you. 12, Therefore, brethren, we are debtors, not to the flesh, to live after the flesh. 13, For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
Hence the scriptures....
Truly, truly, I say unto thee, Except a man be born again, he cannot see the kingdom of God. I say unto you, except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
Marvel not that I said unto thee, Ye must be born again. The wind blows where it wants, and you hear the sound thereof, but cannot tell where it comes, and where it goes: so is every one that is born of the Spirit.
Whosoever is born of God does not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God. In this the children of God are manifest, and the children of the devil: whosoever does not righteousness is not of God, neither he that loves not his brother.
Hope this helps, late my time talk latter...