Tertullian

“ We have indeed borne the image of the earthy, by our sharing in his transgression, by our participation in his death, by our banishment from Paradise. Now, although the image of Adam is here borne by is in the flesh, yet we are not exhorted to put off the flesh; but if not the flesh, it is the conversation, in order that we may then bear the image of the heavenly in ourselves,—no longer indeed the image of God, and no longer the image of a Being whose state is in heaven ”

“ And so wholly intent on the inculcation of moral conduct is he throughout this passage, that he tells us we ought to bear the image of Christ in this flesh of ours, and in this period of instruction and discipline. For when he says “let us bear” in the imperative mood, he suits his words to the present life, in which man exists in no other substance than as flesh and soul; or if it is another, even the heavenly, substance to which this faith (of ours) looks forward, yet the promise is made to that substance to which the injunction is given to labour earnestly to merit its reward. ”

“ Of course, as the apostle has never put the substance for the works of man, he cannot use such a construction here. Since, however he has declared of men which are yet alive in the flesh, that they “are not in the flesh,” [11] meaning that they are not living in the works of the flesh, you ought not to subvert its form nor its substance, but only the works done in the substance (of the flesh) , alienating us from the kingdom of God. ”