Tertullian

“ To administer poison is a crime, but the cup in which it is given is not guilty. So the body is the vessel of the works of the flesh, whilst the soul which is within it mixes the poison of a wicked act. ”

“ There is, I imagine, no other time wherein a man can work. If, however, whilst we are even naturally living in the flesh, we yet eschew the deeds of the flesh, then we shall not be in the flesh; since, although we are not absent from the substance of the flesh, we are notwithstanding strangers to the sin thereof. Now, since in the word flesh we are enjoined to put off, not the substance, but the works of the flesh, therefore in the use of the same word the kingdom of God is denied to the works of the flesh, not to the substance thereof. ”

“ In short, since it is not the soul, but the flesh which is “sown in corruption,” when it turns to decay in the ground, it follows that (after such dissolution) the soul is no longer the natural body, but the flesh, which was the natural body, (is the subject of the future change) , forasmuch as of a natural body it is made a spiritual body, as he says further down, “That was not first which is spiritual.” [29] For to this effect he just before remarked of Christ Himself: “The first man Adam was made a living soul, the last Adam was made a quickening spirit.” ”