The law of Mose…
The law of Moses dealt with the flesh trying to change the spirit. through physical punishment, did not work. Yes they physically feared God so they obeyed the law, but they hated it, and feared the one who imposed it upon them. God saw the law did not change souls, only actions, so he drafted another covenant.
The law of Jesus deals with the spirit to change the flesh. through first changing the heart/core of man, through love, instead of punishment, when you see a person doing good things with their hands, and happily doing so, we think Jesus has gotten through to this person. But really only God can see the heart. I guess we will see if the “New covenant” works better than the “Old” only God and time will tell.
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.
It is not easy, as Paul said, but we have got to get both body and soul obeying the law of Jesus. A righteous Soul has to control a sinful body, not the other way around.
Rom 7:24 O wretched man that I am! who shall deliver me from the body of this death