Tertullian

Throughout this chapter, while withdrawing our members from unrighteousness and sin and applying them to righteousness and holiness, and transferring the same from the wages of death to the gift of eternal life, Paul undoubtedly promises to the flesh the reward of salvation. Now it would not have been consistent for a rule of holiness and righteousness to be especially enjoined for the flesh if the reward of such a discipline were not also within its reach; nor could even baptism be ordered for the flesh if by its regeneration a course were not inaugurated tending to its restitution.