That chapter basically means, that even though you follow the law, your heart can still be wrong, as we can still lust after the flesh inwardly having a wrong heart and mind.
Even if we live by the law outwardly, we can still lust after the flesh, God wants that heart of lust gone from within us and that's only possible through Christ by the Spirit he's the way, the truth and the life. Those who have true faith in God and live by his will, in his time, will receive the blessing of the Spirit, and they live by faith and listen to the Spirit and they are being cleansed inwardly without the letter of the law, both Jew and gentile through Christ, having the wall between them broken down, the two becoming one body through Christ Jesus, being taught by the Spirit of truth inwardly, being shown their sins daily as they walk in the truth, and being prompted and urged by the will of God through Christ by the Spirit to turn from sin. And those who listen to the Spirit and obey him, live by the will of God. These are the children of God living be faith, denying themselves to live by God's will, following Jesus. Listening to the Spirit in their heart daily as they walk in the Spirit, walking in the light baring witness to the truth.
It's not just reading the letter of the law and following it, (although the law is good and puts you to death), it's listening to the law being written in our hearts and in our minds by the Spirit as he guides and teaches us daily in the truth, the law puts us to death, but the spirit brings us life and light. And Christ Jesus is that life and light, and he has lived it out as a perfect example for us to follow, he had the fullness of God and the full power of the Spirit because he denied his flesh completely to live by the will of God and he's fulfilled the laws and showed us the way to live right before God. And his sheep hear his voice and they follow him in a new and living way to live before the father, and they are given help to overcome the flesh and world, by the power of the Spirit, through Christ, through faith by the grace of God.
Without God, we can do nothing as sin dwells in us, and our flesh always sins, this is where Satan is, in the flesh, this is the dust that he crawls in, the flesh is the food of his days and his days are darkness, he can't see light, and neither can those who live in the flesh and love this world, their only hope is Christ Jesus and we are made righteous and just through Christ by the Spirit as the Spirit changes our hearts to be more like that of Jesus. The more we are willing to lay down our lives and turn from this world of sin, and deny our flesh, the more God will help us and we will become stronger in him and overcome if we live by his will and remain in his goodness.
With God all things are possible, and we can overcome anything that Satan throws at us or tempts us with, because he who is in us is stronger than he who is the world. And God won't let Satan corrupt the hearts of those who belong to him, those that live by his will, he will seal them with the Holy Spirit and give them the strength to bare suffering and persecution and help them to deny the fleshly ways of the world as they live by faith daily in him, walking in the Spirit alive in God through Christ.
My heart is constantly with God, I talk to him always, I pray anywhere I love him deeply and I know that I must put him before others in my life and before myself also. I must bow down the knee and become humble, my old man gone being covered by Christ, because that's the only way that we can reach anyone in this world, because it's only through a humble heart that Christ can work his miracles and give sight to the blind, give hearing to the deaf, help the lame to walk and bring the dead to life by the word of God and the life of Christ, in and through those who belong to him.
