“It is sown,” he says, “in corruption; it is raised in incorruption: it is sown in weakness; it is raised in power: it is sown in dishonour; it is raised in glory: it is sown a natural body; it is raised a spiritual body.” The grain of wheat, after its dissolution in the soil, leaves behind the slightness of its bulk and the peculiar quality of its shape, and yet it has not left and lost itself, but, still self-centred, grows into the ear, though in many points it has made an advance upon itself, viz. in size, in splendour, in complexity, in form.
In the same fashion the human being deposits in death all those peculiar surroundings which it has acquired from passionate propensities; dishonour, I mean, and corruption and weakness and characteristics of age; and yet the human being does not lose itself. It changes into an ear of grain as it were; into incorruption, that is, and glory and honour and power and absolute perfection; into a condition in which its life is no longer carried on in the ways peculiar to mere nature, but has passed into a spiritual and passionless existence.
For it is the peculiarity of the natural body to be always moving on a stream, to be always altering from its state for the moment and changing into something else; but none of these processes, which we observe not in man only but also in plants and brutes will be found remaining in the life that shall be then. Further, it seems to me that the words of the Apostle in every respect harmonize with our own conception of what the Resurrection is. They indicate the very same thing that we have embodied in our own definition of it, wherein we said that the Resurrection is no other thing than “the re-constitution of our nature in its original form.” For, whereas we learn from Scripture in the account of the first Creation, that first the earth brought forth “the green herb” (as the narrative says), and that then from this plant seed was yielded, from which, when it was shed on the ground, the same form of the original plant again sprang up, the Apostle, it is to be observed, declares that this very same thing happens in the Resurrection also; and so we learn from him the fact, not only that our humanity will be then changed into something nobler, but also that what we have therein to expect is nothing else than that which was at the beginning. In the beginning, we see, it was not an ear rising from a grain, but a grain coming from an ear, and, after that, the ear grows round the grain: and so the order indicated in this similitude clearly shows that all that blessed state, which arises for us by means of the Resurrection is only a return to our pristine state of grace. We too, in fact, were once in a fashion a full ear; but the burning heat of sin withered us up, and then on our dissolution by death the earth received us: but in the spring of the Resurrection she will reproduce this naked grain of our body in the form of an ear, tall, well-proportioned, and erect, reaching to the heights of heaven, and, for blade and beard, resplendent in incorruption, and with all the other godlike marks. For “this corruptible must put on incorruption”; and this incorruption and glory and honour and power are those distinct and acknowledged marks of Deity which once belonged to him who was created in God's image, and which we hope for hereafter. The first man Adam, that is, was the first ear; but with the arrival of evil human nature was diminished into a mere multitude; and, as happens to the grain on the ear, each individual man was denuded of the beauty of that primal ear, and mouldered in the soil: but in the Resurrection we are born again in our original splendour; only instead of that single primitive ear we become the countless myriads of ears in the cornfields. The virtuous life as contrasted with that of vice is distinguished thus: those who while living have by virtuous conduct exercised husbandry on themselves are at once revealed in all the qualities of a perfect ear, while those whose bare grain (that is the forces of their natural soul) has become through evil habits degenerate, as it were, and hardened by the weather (as the so-called “hornstruck” seeds, according to the experts in such things, grow up), will, though they live again in the Resurrection, experience very great severity from their Judge, because they do not possess the strength to shoot up into the full proportions of an ear, and thereby become that which we were before our earthly fall. The remedy offered by the Overseer of the produce is to collect together the tares and the thorns, which have grown up with the good seed, and into whose bastard life all the secret forces that once nourished its root have passed, so that it not only has had to remain without its nutriment, but has been choked and so rendered unproductive by this unnatural growth. When from the nutritive part within them everything that is the reverse or the counterfeit of it has been picked out, and has been committed to the fire that consumes everything unnatural, and so has disappeared, then in this class also their humanity will thrive and will ripen into fruit-bearing, owing to such husbandry, and some day after long courses of ages will get back again that universal form which God stamped upon us at the beginning. Blessed are they, indeed, in whom the full beauty of those ears shall be developed directly they are born in the Resurrection. Yet we say this without implying that any merely bodily distinctions will be manifest between those who have lived virtuously and those who have lived viciously in this life, as if we ought to think that one will be imperfect as regards his material frame, while another will win perfection as regards it. The prisoner and the free, here in this present world, are just alike as regards the constitutions of their two bodies; though as regards enjoyment and suffering the gulf is wide between them. In this way, I take it, should we reckon the difference between the good and the bad in that intervening time. For the perfection of bodies that rise from that sowing of death is, as the Apostle tells us, to consist in incorruption and glory and honour and power; but any diminution in such excellences does not denote a corresponding bodily mutilation of him who has risen again, but a withdrawal and estrangement from each one of those things which are conceived of as belonging to the good. Seeing, then, that one or the other of these two diametrically opposed ideas, I mean good and evil, must any way attach to us, it is clear that to say a man is not included in the good is a necessary demonstration that he is included in the evil. But then, in connection with evil, we find no honour, no glory, no incorruption, no power; and so we are forced to dismiss all doubt that a man who has nothing to do with these last-mentioned things must be connected with their opposites, viz. with weakness, with dishonour, with corruption, with everything of that nature, such as we spoke of in the previous parts of the discussion, when we said how many were the passions, sprung from evil, which are so hard for the soul to get rid of, when they have infused themselves into the very substance of its entire nature and become one with it. When such, then, have been purged from it and utterly removed by the healing processes worked out by the Fire, then every one of the things which make up our conception of the good will come to take their place; incorruption, that is, and life, and honour, and grace, and glory, and everything else that we conjecture is to be seen in God, and in His Image, man as he was made.
Source: On the Soul and the Resurrection (New Advent)