For the first opinion on account of its explanation of the process of multiplication is able to admit perfection of the truth of human nature, both as regards the number of individuals and as regards the due quantity of each individual, without taking into account that which is produced from food; for this is not added except for the purpose of resisting the destruction that might result from the action of natural heat, as lead is added to silver lest it be destroyed in melting. Wherefore since at the resurrection it behooves human nature to be restored to its perfection, nor does the natural heat tend to destroy the natural humor, there will be no need for anything resulting from food to rise again in man, but that alone will rise again which belonged to the truth of the human nature of the individual, and this reaches the aforesaid perfection in number and quantity by being detached and multiplied.
The second opinion, since it maintains that what is produced from food is needed for the perfection of quantity in the individual and for the multiplication that results from generation, must needs admit that something of this product from food shall rise again: not all, however, but only so much as is required for the perfect restoration of human nature in all its individuals. Hence this opinion asserts that all that was in the substance of the seed will rise again in this man who was begotten of this seed; because this belongs chiefly to the truth of human nature in him: while of that which afterwards he derives from nourishment, only so much will rise again in him as is needed for the perfection of his quantity; and not all, because this does not belong to the perfection of human nature, except in so far as nature requires it for the perfection of quantity. Since however this nutrimental humor is subject to ebb and flow the restoration will be effected in this order, that what first belonged to the substance of a man's body, will all be restored, and of that which was added secondly, thirdly, and so on, as much as is required to restore quantity. This is proved by two reasons. First, because that which was added was intended to restore what was wasted at first, and thus it does not belong principally to the truth of human nature to the same extent as that which came first. Secondly, because the addition of extraneous humor to the first radical humors results in the whole mixture not sharing the truth of the specific nature as perfectly as the first did: and the Philosopher instances as an example (De Gener. i) the mixing of water with wine, which always weakens the strength of the wine, so that in the end the wine becomes watery: so that although the second water be drawn into the species of wine, it does not share the species of wine as perfectly as the first water added to the wine. Even so that which is secondly changed from food into flesh does not so perfectly attain to the species of flesh as that which was changed first, and consequently does not belong in the same degree to the truth of human nature nor to the resurrection. Accordingly it is clear that this opinion maintains that the whole of what belongs to the truth of human nature principally will rise again, but not the whole of what belongs to the truth of human nature secondarily.
The third opinion differs somewhat from the second and in some respects agrees with it. It differs in that it maintains that whatever is under the form of flesh and bone all belongs to the truth of human nature, because this opinion does not distinguish as remaining in man during his whole lifetime any signate matter that belongs essentially and primarily to the truth of human nature, besides something ebbing and flowing, that belongs. to the truth of human nature merely on account of the perfection of quantity, and not on account of the primary being of the species, as the second opinion asserted. But it states that all the parts that are not beside the intention of the nature generated belong to the truth of human nature, as regards what they have of the species, since thus they remain; but not as regards what they have of matter, since thus they are indifferent to ebb and flow: so that we are to understand that the same thing happens in the parts of one man as in the whole population of a city, for each individual is cut off from the population by death, while others take their place: wherefore the parts of the people flow back and forth materially, but remain formally, since these others occupy the very same offices and positions from which the former were withdrawn, so that the commonwealth is said to remain the selfsame. In like manner, while certain parts are on the ebb and others are being restored to the same shape and position, all the parts flow back and forth as to their matter, but remain as to their species; and nevertheless the selfsame man remains.
On the other hand, The third opinion agrees with the second, because it holds that the parts which come secondly do not reach the perfection of the species so perfectly as those which come first: and consequently the third opinion asserts that the same thing rises again in man as the second opinion maintains, but not for quite the same reason. For it holds that the whole of what is produced from the seed will rise again, not because it belongs to the truth of human nature otherwise than that which comes after, but because it shares the truth of human nature more perfectly: which same order the second opinion applied to those things that are produced afterwards from food, in which point also these two opinions agree.
Reply to Objection 1: A natural thing is what it is, not from its matter but from its form; wherefore, although that part of matter which at one time was under the form of bovine flesh rises again in man under the form of human flesh, it does not follow that the flesh of an ox rises again, but the flesh of a man: else one might conclude that the clay from which Adam's body was fashioned shall rise again. The second opinion, however, grants this argument.
Reply to Objection 2: That rib did not belong to the perfection of the individual in Adam, but was directed to the multiplication of the species. Hence it will rise again not in Adam but in Eve, just as the seed will rise again, not in the begetter, but in the begotten.
Reply to Objection 3: According to the first opinion it is easy to reply to this argument, because the flesh that is eaten never belonged to the truth of human nature in the eater, but it did belong to the truth of human nature in him whose flesh was eaten: and thus it will rise again in the latter but not in the former. according to the second and third opinions, each one will rise again in that wherein he approached nearest to the perfect participation of the virtue of the species, and if he approached equally in both, he will rise again in that wherein he was first, because in that he first was directed to the resurrection by union with the rational soul of that man. Hence if there were any surplus in the flesh eaten, not belonging to the truth of human nature in the first man, it will be possible for it to rise again in the second: otherwise what belonged to the resurrection in the first will rise again in him and not in the second; but in the second its place is taken either by something of that which was the product from other food, or if he never partook of any other food than human flesh, the substitution is made by Divine power so far as the perfection of quantity requires, as it does in those who die before the perfect age. Nor does this derogate from numerical identity, as neither does the ebb and flow of parts.
Reply to Objection 4: According to the first opinion this argument is easily answered. For that opinion asserts that the seed is not from the surplus food: so that the flesh eaten is not changed into the seed whereof the child is begotten. But according to the other two opinions we must reply that it is impossible for the whole of the flesh eaten to be changed into seed, because it is after much separation that the seed is distilled from the food, since seed is the ultimate surplus of food. That part of the eaten flesh which is changed into seed belongs to the truth of human nature in the one born of the seed more than in the one of whose flesh the seed was the product. Hence according to the rule already laid down (ad 3), whatever was changed into the seed will rise again in the person born of the seed; while the remaining matter will rise again in him of whose flesh the seed was the product.
Reply to Objection 5: The embryo is not concerned with the resurrection before it is animated by a rational soul, in which state much has been added to the seminal substance from the substance of food, since the child is nourished in the mother's womb. Consequently on the supposition that a man partook of such food, and that some one were begotten of the surplus thereof, that which was in the seminal substance will indeed rise again in the one begotten of that seed; unless it contain something that would have belonged to the seminal substance in those from whose flesh being eaten the seed was produced, for this would rise again in the first but not in the second. The remainder of the eaten flesh, not being changed into seed, will clearly rise again in the first the Divine power supplying deficiencies in both. The first opinion is not troubled by this objection, since it does not hold the seed to be from the surplus food: but there are many other reasons against it as may be seen in the Second Book (Sent. ii, D, 30; FP, Q[119], A[2]).
Whether whatever was materially in a man's members will all rise again?
Objection 1: It would seem that whatever was materially in a man's members will all rise again. For the hair, seemingly, is less concerned in the resurrection than the other members. Yet whatever was in the hair will all rise again, if not in the hair, at least in other parts of the body, as Augustine says (De Civ. Dei xxii) quoted in the text (Sent. iv, D, 44). Much more therefore whatever was materially in the other members will all rise again.
Objection 2: Further, just as the parts of the flesh are perfected as to species by the rational soul, so are the parts as to matter. But the human body is directed to the resurrection through being perfected by a rational soul. Therefore not only the parts of species but also the parts of matter will all rise again.
Objection 3: Further, the body derives its totality from the same cause as it derives its divisibility into parts. But division into parts belongs to a body in respect of matter the disposition of which is quantity in respect of which it is divided. Therefore totality is ascribed to the body in respect of its parts of matter. If then all the parts of matter rise not again, neither will the whole body rise again: which is inadmissible.
On the contrary, The parts of matter are not permanent in the body but ebb and flow, as stated in De Gener. i. If, therefore, all the parts of matter, which remain not but ebb and flow, rise again, either the body of one who rises again will be very dense, or it will be immoderate in quantity.
Further, whatever belongs to the truth of human nature in one man can all be a part of matter in another man, if the latter were to partake of his flesh. Therefore if all the parts of matter in one man were to rise again it follows that in one man there will rise again that which belongs to the truth of human nature in another: which is absurd.
I answer that, What is in man materially, is not directed to the resurrection, except in so far as it belongs to the truth of human nature; because it is in this respect that it bears a relation to the human souls. Now all that is in man materially belongs indeed to the truth of human nature in so far as it has something of the species, but not all, if we consider the totality of matter; because all the matter that was in a man from the beginning of his life to the end would surpass the quantity due to his species, as the third opinion states, which opinion seems to me more probable than the others. Wherefore the whole of what is in man will rise again, if we speak of the totality of the species which is dependent on quantity, shape, position and order of parts, but the whole will not rise again if we speak of the totality of matter. The second and first opinions, however, do not make this distinction, but distinguish between parts both of which have the species and matter. But these two opinions agree in that they both state what is produced from the seed will all rise again even if we speak of totality of matter: while they differ in this that the first opinion maintains that nothing will rise again of that which was engendered from food, whereas the second holds that something but not all, thereof will rise again, as stated above (A[4]).
Reply to Objection 1: Just as all that is in the other parts of the body will rise again, if we speak of the totality of the species, but not if we speak of material totality, so is it with the hair. In the other parts something accrues from nourishment which causes growth, and this is reckoned as another part, if we speak of totality of species, since it occupies another place and position in the body, and is under other parts of dimension: and there accrues something which does not cause growth, but serves to make up for waste by nourishing. and this is not reckoned as another part of the whole considered in relation to the species, since it does not occupy another place or position in the body than that which was occupied by the part that has passed away: although it may be reckoned another part if we consider the totality of matter. The same applies to the hair. Augustine, however, is speaking of the cutting of hair that was a part causing growth of the body; wherefore it must needs rise again, not however as regards the quantity of hair, lest it should be immoderate, but it will rise again in other parts as deemed expedient by Divine providence. Or else he refers to the case when something will be lacking to the other parts, for then it will be possible for this to be supplied from the surplus of hair.
Reply to Objection 2: According to the third opinion parts of species are the same as parts of matter: for the Philosopher does not make this distinction (De Gener. i) in order to distinguish different parts, but in order to show that the same parts may be considered both in respect of species, as to what belongs to the form and species in them, and in respect of matter, as to that which is under the form and species. Now it is clear that the matter of the flesh has no relation to the rational soul except in so far as it is under such a form, and consequently by reason thereof it is directed to the resurrection. But the first and second opinions which draw a distinction between parts of species and parts of matter say that although the rational soul perfects both parts, it does not perfect parts of matter except by means of the parts of species, wherefore they are not equally directed to the resurrection.
Reply to Objection 3: In the matter of things subject to generation and corruption it is necessary to presuppose indefinite dimensions before the reception of the substantial form. Consequently division which is made according to these dimensions belongs properly to matter. But complete and definite quantity comes to matter after the substantial form; wherefore division that is made in reference to definite quantity regards the species especially when definite position of parts belongs to the essence of the species, as in the human body.