OK but I don't understand what you're getting at then. Are you saying the Ten Commandments are the law of Christ?
I read -
the law of the Spirit of life in Christ Jesus
It isn't merely the law of the Spirit.
I love Romans BTW.
No, the law of the Spirit simply means the power of God's Spirit, the same power that was in Christ Jesus. It is this power that can override "the law of sin" (the power of sin) so that we can become more like Christ.....
If you read Romans chapter 7 & 8 you will notice Paul speaks of 3 laws (forces or powers):
1] The law of sin
2] The law of my mind
3] The law of the Spirit
# 1 is our bent-to-self that makes all sin possible.
# 2 is our will power - our desire to do good.
# 3 is the power of God's Spirit.
Notice that our desire to do good, in and of itself, does not produce righteousness:
Romans 7: 22 For in my inner being (in my heart/conscience) I delight in God's law; 23 but I see another law at work in the members of my body,
waging war against the
law of my mind (my will power - my desire to do good) and making me a prisoner of
the law of sin (my sinful nature - my bent-to-self) at work within my members....
So our desire to do good through our will power always fails because "the law of sin" is stronger than our will power. But "the law of the Spirit" can defeat "the law of sin" and therefore we can become more in harmony with God's law.
Read Romans 8:2-4 to see this:
2 For
the law of the Spirit of life in Christ Jesus has set you free from the law of sin and of death. 3 For what the Law could not do, weak as it was through the flesh (our will power), God did: sending His own Son in the likeness of sinful flesh and as an offering for sin,
He condemned sin in the flesh, 4
so that the requirement of the Law (agape love) might be fulfilled in us, who do not walk according to the flesh but according to the Spirit....