OF THE INTEGRITY OF THE BODIES IN THE RESURRECTION (FIVE ARTICLES)
We must next consider the integrity of the bodies in the resurrection. Under this head there are five points of inquiry:
(1) Whether all the members of the human body will rise again therein?
(2) Whether the hair and nails will?
(3) Whether the humors will?
(4) Whether whatever the body contained belonging to the truth of human nature will rise again?
(5) Whether whatever it contained materially will rise again?
Whether all the members of the human body will rise again?
Objection 1: It would seem that not all the members of the human body will rise again. For if the end be done away it is useless to repair the means. Now the end of each member is its act. Since then nothing useless is done in the Divine works, and since the use of certain members is not fitting to man after the resurrection, especially the use of the genital members, for then they "shall neither marry, nor be married" ( Mat. 22:30 ), it would seem that not all the members shall rise again.
Objection 2: Further, the entrails are members: and yet they will not rise again. For they can neither rise full, since thus they contain impurities, nor empty, since nothing is empty in nature. Therefore the members shall not all rise again.
Objection 3: Further, the body shall rise again that it may be rewarded for the works which the soul did through it. Now the member of which a thief has been deprived for theft, and who has afterwards done penance and is saved, cannot be rewarded at the resurrection, neither for any good deed, since it has not co-operated in any, nor for evil deeds, since the punishment of the member would redound to the punishment of man. Therefore the members will not all rise again.
On the contrary, The other members belong more to the truth of human nature than hair and nails. Yet these will be restored to man at the resurrection according to the text (Sent. iv, D, 4). Much more therefore does this apply to the other members.
Further, "The works of God are perfect" ( Dt. 32:4 ). But the resurrection will be the work of God. Therefore man will be remade perfect in all his members.
I answer that, As stated in De Anima ii, 4, "the soul stands in relation to the body not only as its form and end, but also as efficient cause." For the soul is compared to the body as art to the thing made by art, as the Philosopher says (De Anim. Gener. ii, 4), and whatever is shown forth explicitly in the product of art is all contained implicitly and originally in the art. In like manner whatever appears in the parts of the body is all contained originally and, in a way, implicitly in the soul. Thus just as the work of an art would not be perfect, if its product lacked any of the things contained in the art, so neither could man be perfect, unless the whole that is contained enfolded in the soul be outwardly unfolded in the body, nor would the body correspond in full proportion to the soul. Since then at the resurrection it behooves man's body to correspond entirely to the soul, for it will not rise again except according to the relation it bears to the rational soul, it follows that man also must rise again perfect, seeing that he is thereby repaired in order that he may obtain his ultimate perfection. Consequently all the members that are now in man's body must needs be restored at the resurrection.
Reply to Objection 1: The members may be considered in two ways in relation to the soul: either according to the relation of matter to form, or according to the relation of instrument to agent, since "the whole body is compared to the whole soul in the same way as one part is to another" (De Anima ii, 1). If then the members be considered in the light of the first relationship, their end is not operation, but rather the perfect being of the species, and this is also required after the resurrection: but if they be considered in the light of the second relationship, then their end is operation. And yet it does not follow that when the operation fails the instrument is useless, because an instrument serves not only to accomplish the operation of the agent, but also to show its virtue. Hence it will be necessary for the virtue of the soul's powers to be shown in their bodily instruments, even though they never proceed to action, so that the wisdom of God be thereby glorified.
Reply to Objection 2: The entrails will rise again in the body even as the other members: and they will be filled not with vile superfluities but with goodly humors.
Reply to Objection 3: The acts whereby we merit are not the acts, properly speaking, of hand or foot but of the whole man; even as the work of art is ascribed not to the instrument but to the craftsman. Therefore though the member which was cut off before a man's repentance did not co-operate with him in the state wherein he merits glory, yet man himself merits that the whole man may be rewarded, who with his whole being serves God.
Whether the hair and nails will rise again in the human body?
Objection 1: It would seem that the hair and nails will not rise again in the human body. For just as hair and nails result from the surplus of food, so do urine, sweat and other superfluities or dregs. But these will not rise again with the body. Neither therefore will hair and nails.
Objection 2: Further, of all the superfluities that are produced from food, seed comes nearest to the truth of human nature, since though superfluous it is needed. Yet seed will not rise again in the human body. Much less therefore will hair and nails.
Objection 3: Further, nothing is perfected by a rational soul that is not perfected by a sensitive soul. But hair and nails are not perfected by a sensitive soul, for "we do not feel with them" (De Anima i, 5; iii, 13). Therefore since the human body rises not again except because it is perfected by a rational soul, it would seem that the hair and nails will not rise again.
On the contrary, It is written ( Lk. 21:18 ): "A hair of your head shall not perish."
Further, hair and nails were given to man as an ornament. Now the bodies of men, especially of the elect, ought to rise again with all their adornment. Therefore they ought to rise again with the hair.
I answer that, The soul is to the animated body, as art is to the work of art, and is to the parts of the body as art to its instruments: wherefore an animated body is called an organic body. Now art employs certain instruments for the accomplishment of the work intended, and these instruments belong to the primary intention of art: and it also uses other instruments for the safe-keeping of the principal instruments, and these belong to the secondary intention of art: thus the art of warfare employs a sword for fighting, and a sheath for the safe-keeping of the sword. And so among the parts of an animated body, some are directed to the accomplishment of the souls' operations, for instance the heart, liver, hand, foot; while others are directed to the safe-keeping of the other parts as leaves to cover fruit; and thus hair and nails are in man for the protection of other parts. Consequently, although they do not belong to the primary perfection of the human body, they belong to the secondary perfection: and since man will rise again with all the perfections of his nature, it follows that hair and nails will rise again in him.
Reply to Objection 1: Those superfluities are voided by nature, as being useful for nothing. Hence they do not belong to the perfection of the human body. It is not so with the superfluities which nature reserves for the production of hair and nails which she needs for the protection of the members.