Paul closes his letter with a warning and a promise. Believers are to watch out for those who create divisions contrary to sound doctrine and avoid them. The antidote is not obsession with evil, but wisdom in what is good and innocence regarding what is evil. As the church remains anchored in God’s Word and obedient to Christ, it participates in God’s victory. The promise stands firm: the God of peace will soon crush Satan under your feet. Christ has already won the decisive victory; believers now live and act in light of it.