“Paul says that one weapon in this ongoing fight of faith is the practice of “disciplining” the body. He was not unaware that the desires of the body are deceitful as well as delightful. He said that the “old self” is “being corrupted in accordance with the desires of deceit ” (Ephesians 4:22, AT ). The nature of this deceit is to lure us subtly into living for the “fleeting pleasures” of body and mind, rather than the spiritual delights of knowing and serving God. These pleasures start as innocent delights in food and reading and resting and playing, but then become ends in themselves and choke off spiritual hunger for God.”