Our sinful selves want what is against the Spirit, and the Spirit wants what is against our sinful selves. The two are against each other, so you cannot do just what you please.
Then Jesus said to Peter, “Go away from me, Satan! You are not helping me! You don’t care about the things of God, but only about the things people think are important.”
If you use your lives to do the wrong things your sinful selves want, you will die spiritually. But if you use the Spirit’s help to stop doing the wrong things you do with your body, you will have true life.
Does this mean that the law is against God’s promises? Never! That would be true only if the law could make us right with God. But God did not give a law that can bring life.