For the sinful nature desires what is contrary to the Spirit, and the Spirit what is contrary to the sinful nature. They are in conflict with each other, so that you do not do what you want. Galatians 5:17
I immediately dove into the book of Romans with a desire and thirst to learn more and more about the war between the flesh and the spirit. Over the last six years, I often find myself rereading chapters five through eight. I often feel like Paul when he said, "Not that I have already obtained all this, or have already been made perfect, but I press on..." (Philippians 3:12). I will the first to admit that I still don't understand it all, but I keep reading and each time I learn something new.
One thing that I have learned is that I am responsible for who wins the battle between the flesh and the spirit....which ever is stronger. I know it sounds simple, but it all depends on what I feed. If I feed my flesh, then it is stronger and will win. If I feed the spirit, it will be stronger and win.
I don't always succeed in making sure that my spirit is the stronger being, but my goal is not to feed the bear! Because whenI do, it becomes a nuisance and I now know that sometimes the only way for it to be "detoured" is for it to be "destroyed".
Therefore, brothers, we have an obligation-but it is not to the sinful nature, to live according to it. For if you live according to the sinful nature, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live, because those who are led by the Spirit of God are sons of God. For you did not receive a spirit that makes you a slave again to fear, but you received the Spirit of sonship. And by him we cry, "Abba, Father."
Those who belong to Christ Jesus have crucified the sinful nature with its passions and desires.