ordained to the restoration of the human race by blotting out sin, it is manifest that it was not fitting for God to become incarnate at the beginning of the human race before sin. For medicine is given only to the sick. Hence our Lord Himself says (Matt. 9:12, 13): "They that are in health need not a physician, but they that are ill...For I am not come to call the just, but sinners."
Nor was it fitting that God should become incarnate immediately after sin. First, on account of the manner of man's sin, which had come of pride; hence man was to be liberated in such a manner that he might be humbled, and see how he stood in need of a deliverer. Hence on the words in Gal. 3:19, "Being ordained by angels in the hand of a mediator," a gloss says: "With great wisdom was it so ordered that the Son of Man should not be sent immediately after man's fall. For first of all God left man under the natural law, with the freedom of his will, in order that he might know his natural strength; and when he failed in it, he received the law; whereupon, by the fault, not of the law, but of his nature, the disease gained strength; so that having recognized his infirmity he might cry out for a physician, and beseech the aid of grace."
Secondly, on account of the order of furtherance in good, whereby we proceed from imperfection to perfection. Hence the Apostle says (1 Cor. 15:46, 47): "Yet that was not first which is spiritual, but that which is natural; afterwards that which is spiritual...The first man was of the earth, earthy; the second man from heaven, heavenly."
Thirdly, on account of the dignity of the incarnate Word, for on the words (Gal. 4:4), "But when the fulness of the time was come," a gloss says: "The greater the judge who was coming, the more numerous was the band of heralds who ought to have preceded him."
Fourthly, lest the fervor of faith should cool by the length of time, for the charity of many will grow cold at the end of the world. Hence (Luke 18:8) it is written: "But yet the Son of Man, when He cometh, shall He find think you, faith on earth?"
Reply Obj. 1: Charity does not put off bringing assistance to a friend: always bearing in mind the circumstances as well as the state of the persons. For if the physician were to give the medicine at the very outset of the ailment, it would do less good, and would hurt rather than benefit. And hence the Lord did not bestow upon the human race the remedy of the Incarnation in the beginning, lest they should despise it through pride, if they did not already recognize their disease.
Reply Obj. 2: Augustine replies to this (De Sex Quest. Pagan., Ep.
cii), saying (Q. 2) that "Christ wished to appear to man and to have His doctrine preached to them when and where He knew those were who would believe in Him. But in such times and places as His Gospel was not preached He foresaw that not all, indeed, but many would so bear themselves towards His preaching as not to believe in His corporeal presence, even were He to raise the dead." But the same Augustine, taking exception to this reply in his book (De Perseverantia ix), says: "How can we say the inhabitants of Tyre and Sidon would not believe when such great wonders were wrought in their midst, or would not have believed had they been wrought, when God Himself bears witness that they would have done penance with great humility if these signs of Divine power had been wrought in their midst?" And he adds in answer (De Perseverantia xi): "Hence, as the Apostle says (Rom. 9:16), 'it is not of him that willeth nor of him that runneth, but of God that showeth mercy'; Who (succors whom He will of) those who, as He foresaw, would believe in His miracles if wrought amongst them, (while others) He succors not, having judged them in His predestination secretly yet justly. Therefore let us unshrinkingly believe His mercy to be with those who are set free, and His truth with those who are condemned." [*The words in brackets are not in the text of St. Augustine].
Reply Obj. 3: Perfection is prior to imperfection, both in time and nature, in things that are different (for what brings others to perfection must itself be perfect); but in one and the same, imperfection is prior in time though posterior in nature. And thus the eternal perfection of God precedes in duration the imperfection of human nature; but the latter's ultimate perfection in union with God follows.
SIXTH ARTICLE [III, Q. 1, Art. 6] Whether the Incarnation Ought to Have Been Put Off Till the End of the World?
Objection 1: It would seem that the work of the Incarnation ought to have been put off till the end of the world. For it is written (Ps.
91:11): "My old age in plentiful mercy"--i.e. "in the last days," as a gloss says. But the time of the Incarnation is especially the time of mercy, according to Ps. 101:14: "For it is time to have mercy on it." Therefore the Incarnation ought to have been put off till the end of the world.
Obj. 2: Further, as has been said (A. 5, ad 3), in the same subject, perfection is subsequent in time to imperfection. Therefore, what is most perfect ought to be the very last in time. But the highest perfection of human nature is in the union with the Word, because "in Christ it hath pleased the Father that all the fulness of the Godhead should dwell," as the Apostle says (Col. 1:19, and 2:9). Therefore the Incarnation ought to have been put off till the end of the world.
Obj. 3: Further, what can be done by one ought not to be done by two.
But the one coming of Christ at the end of the world was sufficient for the salvation of human nature. Therefore it was not necessary for Him to come beforehand in His Incarnation; and hence the Incarnation ought to have been put off till the end of the world.
_On the contrary,_ It is written (Hab. 3:2): "In the midst of the years Thou shalt make it known." Therefore the mystery of the Incarnation which was made known to the world ought not to have been put off till the end of the world.
_I answer that,_ As it was not fitting that God should become incarnate at the beginning of the world, so also it was not fitting that the Incarnation should be put off till the end of the world. And this is shown first from the union of the Divine and human nature.
For, as it has been said (A. 5, ad 3), perfection precedes imperfection in time in one way, and contrariwise in another way imperfection precedes perfection. For in that which is made perfect from being imperfect, imperfection precedes perfection in time, whereas in that which is the efficient cause of perfection, perfection precedes imperfection in time. Now in the work of the Incarnation both concur; for by the Incarnation human nature is raised to its highest perfection; and in this way it was not becoming that the Incarnation should take place at the beginning of the human race. And the Word incarnate is the efficient cause of the perfection of human nature, according to John 1:16: "Of His fulness we have all received"; and hence the work of the Incarnation ought not to have been put off till the end of the world. But the perfection of glory to which human nature is to be finally raised by the Word Incarnate will be at the end of the world.
Secondly, from the effect of man's salvation; for, as is said _Qq.
Vet. et Nov. Test., qu. 83,_ "it is in the power of the Giver to have pity when, or as much as, He wills. Hence He came when He knew it was fitting to succor, and when His boons would be welcome. For when by the feebleness of the human race men's knowledge of God began to grow dim and their morals lax, He was pleased to choose Abraham as a standard of the restored knowledge of God and of holy living; and later on when reverence grew weaker, He gave the law to Moses in writing; and because the gentiles despised it and would not take it upon themselves, and they who received it would not keep it, being touched with pity, God sent His Son, to grant to all remission of their sin and to offer them, justified, to God the Father." But if this remedy had been put off till the end of the world, all knowledge and reverence of God and all uprightness of morals would have been swept away from the earth.
Thirdly, this appears fitting to the manifestation of the Divine power, which has saved men in several ways--not only by faith in some future thing, but also by faith in something present and past.
Reply Obj. 1: This gloss has in view the mercy of God, which leads us to glory. Nevertheless, if it is referred to the mercy shown the human race by the Incarnation of Christ, we must reflect that, as Augustine says (Retract. i), the time of the Incarnation may be compared to the youth of the human race, "on account of the strength and fervor of faith, which works by charity"; and to old age--i.e.
the sixth age--on account of the number of centuries, for Christ came in the sixth age. And although youth and old age cannot be together in a body, yet they can be together in a soul, the former on account of quickness, the latter on account of gravity. And hence Augustine says elsewhere (Qq. lxxxiii, qu. 44) that "it was not becoming that the Master by Whose imitation the human race was to be formed to the highest virtue should come from heaven, save in the time of youth."
But in another work (De Gen. cont. Manich. i, 23) he says: that Christ came in the sixth age--i.e. in the old age--of the human race.
Reply Obj. 2: The work of the Incarnation is to be viewed not as merely the terminus of a movement from imperfection to perfection, but also as a principle of perfection to human nature, as has been said.
Reply Obj. 3: As Chrysostom says on John 3:11, "For God sent not His Son into the world to judge the world" (Hom. xxviii): "There are two comings of Christ: the first, for the remission of sins; the second, to judge the world. For if He had not done so, all would have perished together, since all have sinned and need the glory of God."
Hence it is plain that He ought not to have put off the coming in mercy till the end of the world.
QUESTION 2 OF THE MODE OF UNION OF THE WORD INCARNATE (In Twelve Articles) Now we must consider the mode of union of the Incarnate Word; and, first, the union itself; secondly, the Person assuming; thirdly, the nature assumed.
Under the first head there are twelve points of inquiry: (1) Whether the union of the Word Incarnate took place in the nature?
(2) Whether it took place in the Person?
(3) Whether it took place in the suppositum or hypostasis?
(4) Whether the Person or hypostasis of Christ is composite after the Incarnation?
(5) Whether any union of body and soul took place in Christ?
(6) Whether the human nature was united to the Word accidentally?
(7) Whether the union itself is something created?
(8) Whether it is the same as assumption?
(9) Whether the union of the two natures is the greatest union?
(10) Whether the union of the two natures in Christ was brought about by grace?
(11) Whether any merits preceded it?
(12) Whether the grace of union was natural to the man Christ?
FIRST ARTICLE [III, Q. 2, Art. 1] Whether the Union of the Incarnate Word Took Place in the Nature?
Objection 1: It would seem that the Union of the Word Incarnate took place in the nature. For Cyril says (he is quoted in the acts of the Council of Chalcedon, part ii, act. 1): "We must understand not two natures, but one incarnate nature of the Word of God"; and this could not be unless the union took place in the nature. Therefore the union of the Word Incarnate took place in the nature.
Obj. 2: Further, Athanasius says that, as the rational soul and the flesh together form the human nature, so God and man together form a certain one nature; therefore the union took place in the nature.
Obj. 3: Further, of two natures one is not denominated by the other unless they are to some extent mutually transmuted. But the Divine and human natures in Christ are denominated one by the other; for Cyril says (quoted in the acts of the Council of Chalcedon, part ii, act. 1) that the Divine nature "is incarnate"; and Gregory Nazianzen says (Ep. i ad Cledon.) that the human nature is "deified," as appears from Damascene (De Fide Orth. iii, 6, 11). Therefore from two natures one seems to have resulted.
_On the contrary,_ It is said in the declaration of the Council of Chalcedon: "We confess that in these latter times the only-begotten Son of God appeared in two natures, without confusion, without change, without division, without separation--the distinction of natures not having been taken away by the union." Therefore the union did not take place in the nature.
_I answer that,_ To make this question clear we must consider what is "nature." Now it is to be observed that the word "nature" comes from nativity. Hence this word was used first of all to signify the begetting of living beings, which is called "birth" or "sprouting forth," the word "natura" meaning, as it were, "nascitura."
Afterwards this word "nature" was taken to signify the principle of this begetting; and because in living things the principle of generation is an intrinsic principle, this word "nature" was further employed to signify any intrinsic principle of motion: thus the Philosopher says (Phys. ii) that "nature is the principle of motion in that in which it is essentially and not accidentally." Now this principle is either form or matter. Hence sometimes form is called nature, and sometimes matter. And because the end of natural generation, in that which is generated, is the essence of the species, which the definition signifies, this essence of the species is called the "nature." And thus Boethius defines nature (De Duab.
Nat.): "Nature is what informs a thing with its specific difference, "--i.e. which perfects the specific definition. But we are now speaking of nature as it signifies the essence, or the "what-it-is," or the quiddity of the species.
Now, if we take nature in this way, it is impossible that the union of the Incarnate Word took place in the nature. For one thing is made of two or more in three ways. First, from two complete things which remain in their perfection. This can only happen to those whose form is composition, order, or figure, as a heap is made up of many stones brought together without any order, but solely with juxtaposition; and a house is made of stones and beams arranged in order, and fashioned to a figure. And in this way some said the union was by manner of confusion (which is without order) or by manner of commensuration (which is with order). But this cannot be. First, because neither composition nor order nor figure is a substantial form, but accidental; and hence it would follow that the union of the Incarnation was not essential, but accidental, which will be disproved later on (A. 6). Secondly, because thereby we should not have an absolute unity, but relative only, for there remain several things actually. Thirdly, because the form of such is not a nature, but an art, as the form of a house; and thus one nature would not be constituted in Christ, as they wish.
Secondly, one thing is made up of several things, perfect but changed, as a mixture is made up of its elements; and in this way some have said that the union of the Incarnation was brought about by manner of combination. But this cannot be. First, because the Divine Nature is altogether immutable, as has been said (I, Q. 9, AA. 1, 2), hence neither can it be changed into something else, since it is incorruptible; nor can anything else be changed into it, for it cannot be generated. Secondly, because what is mixed is of the same species with none of the elements; for flesh differs in species from any of its elements. And thus Christ would be of the same nature neither with His Father nor with His Mother. Thirdly, because there can be no mingling of things widely apart; for the species of one of them is absorbed, e.g. if we were to put a drop of water in a flagon of wine. And hence, since the Divine Nature infinitely exceeds the human nature, there could be no mixture, but the Divine Nature alone would remain.
Thirdly, a thing is made up of things not mixed nor changed, but imperfect; as man is made up of soul and body, and likewise of divers members. But this cannot be said of the mystery of the Incarnation.
First, because each nature, i.e. the Divine and the human, has its specific perfection. Secondly, because the Divine and human natures cannot constitute anything after the manner of quantitative parts, as the members make up the body; for the Divine Nature is incorporeal; nor after the manner of form and matter, for the Divine Nature cannot be the form of anything, especially of anything corporeal, since it would follow that the species resulting therefrom would be communicable to several, and thus there would be several Christs.
Thirdly, because Christ would exist neither in human nature nor in the Divine Nature: since any difference varies the species, as unity varies number, as is said (Metaph. viii, text. 10).
Reply Obj. 1: This authority of Cyril is expounded in the Fifth Synod (i.e. Constantinople II, coll. viii, can. 8) thus: "If anyone proclaiming one nature of the Word of God to be incarnate does not receive it as the Fathers taught, viz. that from the Divine and human natures (a union in subsistence having taken place) one Christ results, but endeavors from these words to introduce one nature or substance of the Divinity and flesh of Christ, let such a one be anathema." Hence the sense is not that from two natures one results; but that the Nature of the Word of God united flesh to Itself in Person.
Reply Obj. 2: From the soul and body a double unity, viz. of nature and person--results in each individual--of nature inasmuch as the soul is united to the body, and formally perfects it, so that one nature springs from the two as from act and potentiality or from matter and form. But the comparison is not in this sense, for the Divine Nature cannot be the form of a body, as was proved (I, Q. 3, A. 8). Unity of person results from them, however, inasmuch as there is an individual subsisting in flesh and soul; and herein lies the likeness, for the one Christ subsists in the Divine and human natures.
Reply Obj. 3: As Damascene says (De Fide Orth. iii, 6, 11), the Divine Nature is said to be incarnate because It is united to flesh personally, and not that It is changed into flesh. So likewise the flesh is said to be deified, as he also says (De Fide Orth. 15, 17), not by change, but by union with the Word, its natural properties still remaining, and hence it may be considered as deified, inasmuch as it becomes the flesh of the Word of God, but not that it becomes God.
SECOND ARTICLE [III, Q. 2, Art. 2] Whether the Union of the Incarnate Word Took Place in the Person?
Objection 1: It would seem that the union of the Incarnate Word did not take place in the person. For the Person of God is not distinct from His Nature, as we said (I, Q. 39, A. 1). If, therefore, the union did not take place in the nature, it follows that it did not take place in the person.
Obj. 2: Further, Christ's human nature has no less dignity than ours.
But personality belongs to dignity, as was stated above (I, Q. 29, A.
3, ad 2). Hence, since our human nature has its proper personality, much more reason was there that Christ's should have its proper personality.
Obj. 3: Further, as Boethius says (De Duab. Nat.), a person is an individual substance of rational nature. But the Word of God assumed an individual human nature, for "universal human nature does not exist of itself, but is the object of pure thought," as Damascene says (De Fide Orth. iii, 11). Therefore the human nature of Christ has its personality. Hence it does not seem that the union took place in the person.
_On the contrary,_ We read in the Synod of Chalcedon (Part ii, act.
5): "We confess that our Lord Jesus Christ is not parted or divided into two persons, but is one and the same only-Begotten Son and Word of God." Therefore the union took place in the person.
_I answer that,_ Person has a different meaning from "nature." For nature, as has been said (A. 1), designates the specific essence which is signified by the definition. And if nothing was found to be added to what belongs to the notion of the species, there would be no need to distinguish the nature from the suppositum of the nature (which is the individual subsisting in this nature), because every individual subsisting in a nature would be altogether one with its nature. Now in certain subsisting things we happen to find what does not belong to the notion of the species, viz. accidents and individuating principles, which appears chiefly in such as are composed of matter and form. Hence in such as these the nature and the suppositum really differ; not indeed as if they were wholly separate, but because the suppositum includes the nature, and in addition certain other things outside the notion of the species.
Hence the suppositum is taken to be a whole which has the nature as its formal part to perfect it; and consequently in such as are composed of matter and form the nature is not predicated of the suppositum, for we do not say that this man is his manhood. But if there is a thing in which there is nothing outside the species or its nature (as in God), the suppositum and the nature are not really distinct in it, but only in our way of thinking, inasmuch it is called "nature" as it is an essence, and a suppositum as it is subsisting. And what is said of a suppositum is to be applied to a person in rational or intellectual creatures; for a person is nothing else than "an individual substance of rational nature," according to Boethius. Therefore, whatever adheres to a person is united to it in person, whether it belongs to its nature or not. Hence, if the human nature is not united to God the Word in person, it is nowise united to Him; and thus belief in the Incarnation is altogether done away with, and Christian faith wholly overturned. Therefore, inasmuch as the Word has a human nature united to Him, which does not belong to His Divine Nature, it follows that the union took place in the Person of the Word, and not in the nature.
Reply Obj. 1: Although in God Nature and Person are not really distinct, yet they have distinct meanings, as was said above, inasmuch as person signifies after the manner of something subsisting. And because human nature is united to the Word, so that the Word subsists in it, and not so that His Nature receives therefrom any addition or change, it follows that the union of human nature to the Word of God took place in the person, and not in the nature.
Reply Obj. 2: Personality pertains of necessity to the dignity of a thing, and to its perfection so far as it pertains to the dignity and perfection of that thing to exist by itself (which is understood by the word "person"). Now it is a greater dignity to exist in something nobler than oneself than to exist by oneself. Hence the human nature of Christ has a greater dignity than ours, from this very fact that in us, being existent by itself, it has its own personality, but in Christ it exists in the Person of the Word. Thus to perfect the species belongs to the dignity of a form, yet the sensitive part in man, on account of its union with the nobler form which perfects the species, is more noble than in brutes, where it is itself the form which perfects.
Reply Obj. 3: The Word of God "did not assume human nature in general, but _in atomo_"--that is, in an individual--as Damascene says (De Fide Orth. iii, 11) otherwise every man would be the Word of God, even as Christ was. Yet we must bear in mind that not every individual in the genus of substance, even in rational nature, is a person, but that alone which exists by itself, and not that which exists in some more perfect thing. Hence the hand of Socrates, although it is a kind of individual, is not a person, because it does not exist by itself, but in something more perfect, viz. in the whole. And hence, too, this is signified by a "person" being defined as "an individual substance," for the hand is not a complete substance, but part of a substance. Therefore, although this human nature is a kind of individual in the genus of substance, it has not its own personality, because it does not exist separately, but in something more perfect, viz. in the Person of the Word. Therefore the union took place in the person.
THIRD ARTICLE [III, Q. 2, Art. 3] Whether the Union of the Word Incarnate Took Place in the Suppositum or Hypostasis?
Objection 1: It would seem that the union of the Word Incarnate did not take place in the suppositum or hypostasis. For Augustine says (Enchiridion xxxv, xxxviii): "Both the Divine and human substance are one Son of God, but they are one thing (_aliud_) by reason of the Word and another thing (_aliud_) by reason of the man." And Pope Leo says in his letter to Flavian (Ep. xxviii): "One of these is glorious with miracles, the other succumbs under injuries." But "one" (_aliud_) and "the other" (_aliud_) differ in suppositum. Therefore the union of the Word Incarnate did not take place in the suppositum.
Obj. 2: Further, hypostasis is nothing more than a "particular substance," as Boethius says (De Duab. Nat.). But it is plain that in Christ there is another particular substance beyond the hypostasis of the Word, viz. the body and the soul and the resultant of these.
Therefore there is another hypostasis in Him besides the hypostasis of the Word.
Obj. 3: Further, the hypostasis of the Word is not included in any genus or species, as is plain from the First Part (Q. 3, A. 5). But Christ, inasmuch as He is made man, is contained under the species of man; for Dionysius says (Div. Nom. 1): "Within the limits of our nature He came, Who far surpasses the whole order of nature supersubstantially." Now nothing is contained under the human species unless it be a hypostasis of the human species. Therefore in Christ there is another hypostasis besides the hypostasis of the Word of God; and hence the same conclusion follows as above.
_On the contrary,_ Damascene says (De Fide Orth. iii, 3, 4, 5): "In our Lord Jesus Christ we acknowledge two natures and one hypostasis."
_I answer that,_ Some who did not know the relation of hypostasis to person, although granting that there is but one person in Christ, held, nevertheless, that there is one hypostasis of God and another of man, and hence that the union took place in the person and not in the hypostasis. Now this, for three reasons, is clearly erroneous.
First, because person only adds to hypostasis a determinate nature, viz. rational, according to what Boethius says (De Duab. Nat.), "a person is an individual substance of rational nature"; and hence it is the same to attribute to the human nature in Christ a proper hypostasis and a proper person. And the holy Fathers, seeing this, condemned both in the Fifth Council held at Constantinople, saying: "If anyone seeks to introduce into the mystery of the Incarnation two subsistences or two persons, let him be anathema. For by the incarnation of one of the Holy Trinity, God the Word, the Holy Trinity received no augment of person or subsistence." Now "subsistence" is the same as the subsisting thing, which is proper to hypostasis, as is plain from Boethius (De Duab. Nat.). Secondly, because if it is granted that person adds to hypostasis something in which the union can take place, this something is nothing else than a property pertaining to dignity; according as it is said by some that a person is a "hypostasis distinguished by a property pertaining to dignity." If, therefore, the union took place in the person and not in the hypostasis, it follows that the union only took place in regard to some dignity. And this is what Cyril, with the approval of the Council of Ephesus (part iii, can. 3), condemned in these terms: "If anyone after the uniting divides the subsistences in the one Christ, only joining them in a union of dignity or authority or power, and not rather in a concourse of natural union, let him be anathema." Thirdly, because to the hypostasis alone are attributed the operations and the natural properties, and whatever belongs to the nature in the concrete; for we say that this man reasons, and is risible, and is a rational animal. So likewise this man is said to be a suppositum, because he underlies (_supponitur_) whatever belongs to man and receives its predication. Therefore, if there is any hypostasis in Christ besides the hypostasis of the Word, it follows that whatever pertains to man is verified of some other than the Word, e.g. that He was born of a Virgin, suffered, was crucified, was buried. And this, too, was condemned with the approval of the Council of Ephesus (part iii, can. 4) in these words: "If anyone ascribes to two persons or subsistences such words as are in the evangelical and apostolic Scriptures, or have been said of Christ by the saints, or by Himself of Himself, and, moreover, applies some of them to the man, taken as distinct from the Word of God, and some of them (as if they could be used of God alone) only to the Word of God the Father, let him be anathema." Therefore it is plainly a heresy condemned long since by the Church to say that in Christ there are two hypostases, or two supposita, or that the union did not take place in the hypostasis or suppositum. Hence in the same Synod (can. 2) it is said: "If anyone does not confess that the Word was united to flesh in subsistence, and that Christ with His flesh is both--to wit, God and man--let him be anathema."
Reply Obj. 1: As accidental difference makes a thing "other" (_alterum_), so essential difference makes "another thing" (_aliud_).
Now it is plain that the "otherness" which springs from accidental difference may pertain to the same hypostasis or suppositum in created things, since the same thing numerically can underlie different accidents. But it does not happen in created things that the same numerically can subsist in divers essences or natures. Hence just as when we speak of "otherness" in regard to creatures we do not signify diversity of suppositum, but only diversity of accidental forms, so likewise when Christ is said to be one thing or another thing, we do not imply diversity of suppositum or hypostasis, but diversity of nature. Hence Gregory Nazianzen says in a letter to Chelidonius (Ep. ci): "In the Saviour we may find one thing and another, yet He is not one person and another. And I say 'one thing and another'; whereas, on the contrary, in the Trinity we say one Person and another (so as not to confuse the subsistences), but not one thing and another."
Reply Obj. 2: Hypostasis signifies a particular substance, not in every way, but as it is in its complement. Yet as it is in union with something more complete, it is not said to be a hypostasis, as a hand or a foot. So likewise the human nature in Christ, although it is a particular substance, nevertheless cannot be called a hypostasis or suppositum, seeing that it is in union with a completed thing, viz.
the whole Christ, as He is God and man. But the complete being with which it concurs is said to be a hypostasis or suppositum.
Reply Obj. 3: In created things a singular thing is placed in a genus or species, not on account of what belongs to its individuation, but on account of its nature, which springs from its form, and in composite things individuation is taken more from matter. Hence we say that Christ is in the human species by reason of the nature assumed, and not by reason of the hypostasis.
FOURTH ARTICLE [III, Q. 2, Art. 4] Whether After the Incarnation the Person or Hypostasis of Christ Is Composite?
Objection 1: It would seem that the Person of Christ is not composite. For the Person of Christ is naught else than the Person or hypostasis of the Word, as appears from what has been said (A. 2).
But in the Word, Person and Nature do not differ, as appears from First Part (Q. 39, A. 1). Therefore since the Nature of the Word is simple, as was shown above (I, Q. 3, A. 7), it is impossible that the Person of Christ be composite.
Obj. 2: Further, all composition requires parts. But the Divine Nature is incompatible with the notion of a part, for every part implicates the notion of imperfection. Therefore it is impossible that the Person of Christ be composed of two natures.
Obj. 3: Further, what is composed of others would seem to be homogeneous with them, as from bodies only a body can be composed.
Therefore if there is anything in Christ composed of the two natures, it follows that this will not be a person but a nature; and hence the union in Christ will take place in the nature, which is contrary to A. 2.
_On the contrary,_ Damascene says (De Fide Orth. iii, 3, 4, 5), "In the Lord Jesus Christ we acknowledge two natures, but one hypostasis composed from both."
_I answer that,_ The Person or hypostasis of Christ may be viewed in two ways. First as it is in itself, and thus it is altogether simple, even as the Nature of the Word. Secondly, in the aspect of person or hypostasis to which it belongs to subsist in a nature; and thus the Person of Christ subsists in two natures. Hence though there is one subsisting being in Him, yet there are different aspects of subsistence, and hence He is said to be a composite person, insomuch as one being subsists in two.
And thereby the solution to the first is clear.
Reply Obj. 2: This composition of a person from natures is not so called on account of parts, but by reason of number, even as that in which two things concur may be said to be composed of them.
Reply Obj. 3: It is not verified in every composition, that the thing composed is homogeneous with its component parts, but only in the parts of a continuous thing; for the continuous is composed solely of continuous [parts]. But an animal is composed of soul and body, and neither of these is an animal.
FIFTH ARTICLE [III, Q. 2, Art. 5] Whether in Christ There Is Any Union of Soul and Body?
Objection 1: It would seem that in Christ there was no union of soul and body. For from the union of soul and body in us a person or a human hypostasis is caused. Hence if the soul and body were united in Christ, it follows that a hypostasis resulted from their union. But this was not the hypostasis of God the Word, for It is eternal.
Therefore in Christ there would be a person or hypostasis besides the hypostasis of the Word, which is contrary to AA. 2, 3.
Obj. 2: Further, from the union of soul and body results the nature of the human species. But Damascene says (De Fide Orth. iii, 3), that "we must not conceive a common species in the Lord Jesus Christ."
Therefore there was no union of soul and body in Him.
Obj. 3: Further, the soul is united to the body for the sole purpose of quickening it. But the body of Christ could be quickened by the Word of God Himself, seeing He is the fount and principle of life.
Therefore in Christ there was no union of soul and body.
_On the contrary,_ The body is not said to be animated save from its union with the soul. Now the body of Christ is said to be animated, as the Church chants: "Taking an animate body, He deigned to be born