Tertullian

“ If the soul is flesh, it is no longer soul, but flesh. If the flesh is soul, it is no longer flesh, but soul. Where, then, there is flesh, and where there is soul, it has become both one and the other. ”

“ Now, if they are neither in particular, although they become both one and the other, it is, to say the least, very absurd, that we should understand the soul when we name the flesh, and when we indicate the soul, explain ourselves as meaning the flesh. All things will be in danger of being taken in a sense different from their own proper sense, and, whilst taken in that different sense, of losing their proper one, if they are called by a name which differs from their natural designation. ”

“ Now, if the soul had been flesh, there would have only been in Christ the soul composed of flesh, or else the flesh composed of soul. [14] Since, however, He keeps the species distinct, the flesh and the soul, He shows them to be two. If two, then they are no longer one; if not one, then the soul is not composed of flesh, nor the flesh of soul. For the soul-flesh, or the flesh-soul, is but one; unless indeed He even had some other soul apart from that which was flesh, and bare about another flesh besides that which was soul. ”