“so that he can no longer spend the rest of his natural life living for human appetites and desires, but [lives] for the will and purpose of God.”
If we desire a car, it's not just a fleshly desire, it maybe a need or simply a want. Either one, there is nothing wrong with wanting nice things. In order to obtain them, then we need to enter into a more spiritual atmosphere. Praying brings you to a higher level and makes you much more effective. Anger, resentment, unforgiveness and etc. are attributes of the flesh. Do the opposite so we can move mountains, open doors that should be open and close what should be closed. When we have that power, our whole landscape changes. We have to remove ourselves from earthly ways, cast down the flesh, and we can through the grace of God.