Battle: Sin Energized by Flesh vs. the Spirit Thus we see that the battle in Romans 7–8:15 is warfare with the power of sin energized by the flesh of the believer. Paul’s answer to the sin war we face with the flesh is the answer he also gives in Galatians, “But I say, walk by the Spirit, and you will not carry out the desire of the flesh” (Gal. 5:16). In 8:4 the apostle says that the believer does not “walk according to the flesh, but according to the Spirit.” He says in us “those who are according