"The bodies of the saints, then, shall rise again free from blemish and deformity, just as they will be also free from corruption, encumbrance, or handicap. Their facility [facilitas] will be as complete as their felicity [felicitas]. This is why their bodies are called "spiritual", though undoubtedly they will be bodies and not spirits. For just as now the body is called "animate" [animale], though it is a body and not a "spirit" [anima], so then it will be a "spiritual body," but still a body and not a spirit.
"Accordingly, then, as far as the corruption which weighs down the soul and the vices through which "the flesh lusts against the spirit" (Gal 5:17) are concerned, there will be no "flesh," but only body, since there are bodies that are called "heavenly bodies." (1 Cor 15:40). This is why it is said, "Flesh and blood shall not inherit the Kingdom of God," and then, as if to expound what was said, it adds, "Neither shall corruption inherit incorruption." (1 Cor 15:50). What the writer first called "flesh and blood" he later called "corruption," and what he first called "the Kingdom of God" he then later called "incorruption."
"But, as far as the substance of the resurrection body is concerned, it will even then still be "flesh." This is why the body of Christ is called "flesh" even after the resurrection. Wherefore the apostle also says, "What is sown a natural body [corpus animale] rises as a spiritual body [corpus spirituale]." (1 Cor 15:44). For there will then be such a concord between flesh and spirit—the spirit quickening the servant flesh without any need of sustenance therefrom—that there will be no further conflict within ourselves. And just as there will be no more external enemies to bear with, so neither shall we have to bear with ourselves as enemies within.'
- Augustine, Enchiridion, §91.My most recent heavenly post has started a discussion on the nature of the resurrection body. Come and join in.