In my flesh is no good thing. The sin principle himself dwells in my flesh and my flesh will always serve sin, always. So, what keeps us in the things of Christ? He does. That is why He, in His Spirit, comes and lives inside my spirit. Because my flesh wants to take me away; to take me out into the world; to lead me into sin. My flesh wants to destroy me through sin. So God’s Spirit is there in order to stop me from doing the things that I would want to do in my flesh. To keep me from being carried away by my flesh. And that is what makes me a Christian. The only One who can produce spiritual help is the Spirit of God.