Summa - Supplement 1304
Objection 1: It would seem that it is not a mortal sin to have intercourse with a concubine. For a lie is a greater sin than simple fornication: and a proof of this is that Juda, who did not abhor to commit fornication with Thamar, recoiled from telling a lie, saying (Gn 38,23): "Surely she cannot charge us with a lie." But a lie is not always a mortal sin. Neither therefore is simple fornication.
Objection 2: Further, a deadly sin should be punished with death. But the Old Law did not punish with death intercourse with a concubine, save in a certain case (Dt 22,25). Therefore it is not a deadly sin.
Objection 3: Further, according to Gregory (Moral. xxxiii, 12), the sins of the flesh are less blameworthy than spiritual sins. Now pride and covetousness, which are spiritual sins, are not always mortal sins. Therefore fornication, which is a sin of the flesh, is not always a mortal sin.
Objection 4: Further, where the incentive is greater the sin is less grievous, because he sins more who is overcome by a lighter temptation. But concupiscence is the greatest incentive to lust. Therefore since lustful actions are not always mortal sins, neither is simple fornication a mortal sin.
On the contrary, Nothing but mortal sin excludes from the kingdom of God. But fornicators are excluded from the kingdom of God (1Co 6,9-10). Therefore simple fornication is a mortal sin.
Further, mortal sins alone are called crimes. Now all fornication is a crime according to Tb 4,13, "Take heed to keep thyself . . . from all fornication, and beside thy wife never endure to know crime." Therefore, etc.
I answer that, As we have already stated (Sent. ii, D, 42, Question , Article ), those sins are mortal in their genus which violate the bond of friendship between man and God, and between man and man; for such sins are against the two precepts of charity which is the life of the soul. Wherefore since the intercourse of fornication destroys the due relations of the parent with the offspring that is nature's aim in sexual intercourse, there can be no doubt that simple fornication by its very nature is a mortal sin even though there were no written law.
Reply to Objection 1: It often happens that a man who does not avoid a mortal sin, avoids a venial sin to which he has not so great an incentive. Thus, too, Juda avoided a lie while he avoided not fornication. Nevertheless that would have been a pernicious lie, for it would have involved an injury if he had not kept his promise.
Reply to Objection 2: A sin is called deadly, not because it is punished with temporal, but because it is punished with eternal death. Hence also theft, which is a mortal sin, and many other sins are sometimes not punished with temporal death by the law. The same applies to fornication.
Reply to Objection 3: Just as not every movement of pride is a mortal sin, so neither is every movement of lust, because the first movements of lust and the like are venial sins, even sometimes marriage intercourse. Nevertheless some acts of lust are mortal sins, while some movements of pride are venial: since the words quoted from Gregory are to be understood as comparing vices in their genus and not in their particular acts.
Reply to Objection 4: A circumstance is the more effective in aggravating a sin according as it comes nearer to the nature of sin. Hence although fornication is less grave on account of the greatness of its incentive, yet on account of the matter about which it is, it has a greater gravity than immoderate eating, because it is about those things which tighten the bond of human fellowship, as stated above. Hence the argument does not prove.
Objection 1: It would seem that it has been sometimes lawful to have a concubine. For just as the natural law requires a man to have but one wife, so does it forbid him to have a concubine. Yet at times it has been lawful to have several wives. Therefore it has also been lawful to have a concubine.
Objection 2: Further, a woman cannot be at the same time a slave and a wife; wherefore according to the Law (Dt 21,11, seqq.) a bondswoman gained her freedom by the very fact of being taken in marriage. Now we read that certain men who were most beloved of God, for instance Abraham and Jacob, had intercourse with their bondswomen. Therefore these were not wives, and consequently it was sometime lawful to have a concubine.
Objection 3: Further, a woman who is taken in marriage cannot be cast out, and her son should have a share in the inheritance. Yet Abraham sent Agar away, and her son was not his heir (Gn 21,14). Therefore she was not Abraham's wife.
On the contrary, Things opposed to the precepts of the decalogue were never lawful. Now to have a concubine is against a precept of the decalogue, namely, "Thou shalt not commit adultery." Therefore it was never lawful.
Further, Ambrose says in his book on the patriarchs (De Abraham i, 4): "What is unlawful to a wife is unlawful to a husband." But it is never lawful for a wife to put aside her own husband and have intercourse with another man. Therefore it was never lawful for a husband to have a concubine.
I answer that, Rabbi Moses says (Doc. Perp. iii, 49) that before the time of the Law fornication was not a sin; and he proved his assertion from the fact that Juda had intercourse with Thamar. But this argument is not conclusive. For there is no need to excuse Jacob's sons from mortal sin, since they were accused to their father of a most wicked crime (Gn 37,2), and consented kill Joseph and to sell him. Wherefore we must say that since it is against the natural law to have a concubine outside wedlock, as stated above (Article ), it was never lawful either in itself or by dispensation. For as we have shown (Doc. Perp. iii, 49) intercourse with a woman outside wedlock is an action improportionate to the good of the offspring which is the principal end of marriage: and consequently it is against the first precepts of the natural law which admit of no dispensation. Hence wherever in the Old Testament we read of concubines being taken by such men as we ought to excuse from mortal sin, we must needs understand them to have been taken in marriage, and yet to have been called concubines, because they had something of the character of a wife and something of the character of a concubine. In so far as marriage is directed to its principal end, which is the good of the offspring, the union of wife and husband is indissoluble or at least of a lasting nature, as shown above (Article ), and in regard to this there is no dispensation. But in regard to the secondary end, which is the management of the household and community of works, the wife is united to the husband as his mate: and this was lacking in those who were known as concubines. For in this respect a dispensation was possible, since it is the secondary end of marriage. And from this point of view they bore some resemblance to concubines, and for this reason they were known as such.
Reply to Objection 1: As stated above (Article , ad 7,8) to have several wives is not against the first precepts of the natural law, as it is to have a concubine; wherefore the argument does not prove.
Reply to Objection 2: The patriarchs of old by virtue of the dispensation which allowed them several wives, approached their bondswomen with the disposition of a husband towards his wife. For these women were wives as to the principal and first end of marriage, but not as to the other union which regards the secondary end, to which bondage is opposed since a woman cannot be at once mate and slave.
Reply to Objection 3: As in the Mosaic law it was allowable by dispensation to grant a bill of divorce in order to avoid wife-murder (as we shall state further on, Question , Article ), so by the same dispensation Abraham was allowed to send Agar away, in order to signify the mystery which the Apostle explains (Ga 4,22, seqq.). Again, that this son did not inherit belongs to the mystery, as explained in the same place. Even so Esau, the son of a free woman, did not inherit (Rm 9,13, seqq.). In like manner on account of the mystery it came about that the sons of Jacob born of bond and free women inherited, as Augustine says (Tract. xi in Joan.) because "sons and heirs are born to Christ both of good ministers denoted by the free woman and of evil ministers denoted by the bondswoman."
In the next place we must consider bigamy and the irregularity contracted thereby. Under this head there are five points of inquiry:
(1) Whether irregularity attaches to the bigamy that consists in having two successive wives?
(2) Whether irregularity is contracted by one who has two wives at once?
(3) Whether irregularity is contracted by marrying one who is not a virgin?
(4) Whether bigamy is removed by Baptism?
(5) Whether a dispensation can be granted to a bigamous person?
Objection 1: It would seem that irregularity is not attached to the bigamy that consists in having two wives successively. For multitude and unity are consequent upon being. Since then non-being does not cause plurality, a man who has two wives successively, the one in being, the other in non-being, does not thereby become the husband of more than one wife, so as to be debarred, according to the Apostle (1Tm 3,2 Titus 1Tm 1,6), from the episcopate.
Objection 2: Further, a man who commits fornication with several women gives more evidence of incontinence than one who has several wives successively. Yet in the first case a man does not become irregular. Therefore neither in the second should he become irregular.
Objection 3: Further, if bigamy causes irregularity, this is either because of the sacrament, or because of the carnal intercourse. Now it is not on account of the former, for if a man had contracted marriage by words of the present and, his wife dying before the consummation of the marriage, he were to marry another, he would become irregular, which is against the decree of Innocent III (cap. Dubium, De bigamia). Nor again is it on account of the second, for then a man who had committed fornication with several women would become irregular: which is false. Therefore bigamy nowise causes irregularity.
I answer that, By the sacrament of order a man is appointed to the ministry of the sacraments; and he who has to administer the sacraments to others must suffer from no defect in the sacraments. Now there is a defect in a sacrament when the entire signification of the sacrament is not found therein. And the sacrament of marriage signifies the union of Christ with the Church, which is the union of one with one. Therefore the perfect signification of the sacrament requires the husband to have only one wife, and the wife to have but one husband; and consequently bigamy, which does away with this, causes irregularity. And there are four kinds of bigamy: the first is when a man has several lawful wives successively; the second is when a man has several wives at once, one in law, the other in fact; the third, when he has several successively, one in law, the other in fact; the fourth, when a man marries a widow. Accordingly irregularity attaches to all of these.
There is another consequent reason assigned, since those who receive the sacrament of order should be signalized by the greatest spirituality, both because they administer spiritual things, namely the sacraments, and because they teach spiritual things, and should be occupied in spiritual matters. Wherefore since concupiscence is most incompatible with spirituality, inasmuch as it makes a man to be wholly carnal, they should give no sign of persistent concupiscence, which does indeed show itself in bigamous persons, seeing that they were unwilling to be content with one wife. The first reason however is the better.
Reply to Objection 1: The multitude of several wives at the same time is a multitude simply, wherefore a multitude of this kind is wholly inconsistent with the signification of the sacrament, so that the sacrament is voided on that account. But the multitude of several successive wives is a multitude relatively, wherefore it does not entirely destroy the signification of the sacrament, nor does it void the sacrament in its essence but in its perfection, which is required of those who are the dispensers of sacraments.
Reply to Objection 2: Although those who are guilty of fornication give proof of greater concupiscence, theirs is not a so persistent concupiscence, since by fornication one party is not bound to the other for ever; and consequently no defect attaches to the sacrament.
Reply to Objection 3: As stated above, bigamy causes irregularity, because it destroys the perfect signification of the sacrament: which signification is seated both in the union of minds, as expressed by the consent, and in the union of bodies. Wherefore bigamy must affect both of these at the same time in order to cause irregularity. Hence the decree of Innocent III disposes of the statement of the Master (Sent. iv, D, 27), namely that consent alone by words of the present is sufficient to cause irregularity.
Objection 1: It would seem that irregularity does not result from bigamy when one husband has two wives at the same time, one in law and one in fact. For when the sacrament is void there can be no defect in the sacrament. Now when a man marries a woman in fact but not in law there is no sacrament, since such a union does not signify the union of Christ with the Church. Therefore since irregularity does not result from bigamy except on account of a defect in the sacrament, it would seem that no irregularity attaches to bigamy of this kind.
Objection 2: Further, if a man has intercourse with a woman whom he has married in fact and not in law, he commits fornication if he has not a lawful wife, or adultery if he has. But a man does not become irregular by dividing his flesh among several women by fornication or adultery. Therefore neither does he by the aforesaid kind of bigamy.
Objection 3: Further, it may happen that a man, before knowing carnally the woman he has married in law, marries another in fact and not in law, and knows her carnally, whether the former woman be living or dead. Now this man has contracted marriage with several women either in law or in fact, and yet he is not irregular, since he has not divided his flesh among several women. Therefore irregularity is not contracted by reason of the aforesaid kind of bigamy.
I answer that, Irregularity is contracted in the two second kinds of bigamy, for although in the one there is no sacrament, there is a certain likeness to a sacrament. Wherefore these two kinds are secondary, and the first is the principal kind in causing irregularity.
Reply to Objection 1: Although there is no sacrament in this case there is a certain likeness to a sacrament, whereas there is no such likeness in fornication or adultery. Hence the comparison fails.
This suffices for the Reply to the Second Objection.
Reply to Objection 3: In this case the man is not reckoned a bigamist, because the first marriage lacked its perfect signification. Nevertheless if, by the judgment of the Church, he be compelled to return to his first wife and carnally to know her, he becomes irregular forthwith, because the irregularity is the result not of the sin but of imperfect signification.
Objection 1: It would seem that irregularity is not contracted by marrying one who is not a virgin. For a man's own defect is a greater impediment to him than the defect of another. But if the man himself who marries is not a virgin he does not become irregular. Therefore much less does he if his wife is not a virgin.
Objection 2: Further, it may happen that a man marries a woman after corrupting her. Now, seemingly, such a man does not become irregular, since he has not divided his flesh among several, nor has his wife done so, and yet he marries a woman who is not a virgin. Therefore this kind of bigamy does not cause irregularity.
Objection 3: Further, no man can become irregular except voluntarily. But sometimes a man marries involuntarily one who is not a virgin, for instance when he thinks her a virgin and afterwards, by knowing her carnally, finds that she is not. Therefore this kind does not always cause irregularity.
Objection 4: Further, unlawful intercourse after marriage is more guilty than before marriage. Now if a wife, after the marriage has been consummated, has intercourse with another man, her husband does not become irregular, otherwise he would be punished for his wife's sin. Moreover, it might happen that, after knowing of this, he pays her the debt at her asking, before she is accused and convicted of adultery. Therefore it would seem that this kind of bigamy does not cause irregularity.
On the contrary, Gregory says (Regist. ii, ep. 37): "We command thee never to make unlawful ordinations, nor to admit to holy orders a bigamist, or one who has married a woman that is not a virgin, or one who is unlettered, or one who is deformed in his limbs, or bound to do penance or to perform some civil duty, or who is in any state of subjection."
I answer that, In the union of Christ with the Church unity is found on either side. Consequently whether we find division of the flesh on the part of the husband, or on the part of the wife, there is a defect of sacrament. There is, however, a difference, because on the part of the husband it is required that he should not have married another wife, but not that he should be a virgin, whereas on the part of the wife it is also required that she be a virgin. The reason assigned by those versed in the Decretals is because the bridegroom signifies the Church militant which is entrusted to the care of a bishop, and in which there are many corruptions, while the spouse signifies Christ Who was a virgin: wherefore virginity on the part of the spouse, but not on the part of the bridegroom, is required in order that a man be made a bishop. This reason, however, is expressly contrary to the words of the Apostle (Ep 5,25): "Husbands, love your wives, as Christ also loved the Church," which show that the bride signifies the Church, and the bridegroom Christ; and again he says (Ep 5,23): "Because the husband is the head of the wife, as Christ is the head of the Church." Wherefore others say that Christ is signified by the bridegroom, and that the bride signifies the Church triumphant in which there is no stain. Also that the synagogue was first united to Christ as a concubine; so that the sacrament loses nothing of its signification if the bridegroom previously had a concubine. But this is most absurd, since just as the faith of ancients and of moderns is one, so is the Church one. Wherefore those who served God at the time of the synagogue belonged to the unity of the Church in which we serve God. Moreover this is expressly contrary to Jr 3,14, Ez 16,8, Os 2,16, where the espousals of the synagogue are mentioned explicitly: so that she was not as a concubine but as a wife. Again, according to this, fornication would be the sacred sign [sacramentum] of that union, which is absurd. Wherefore heathendom, before being espoused to Christ in the faith of the Church, was corrupted by the devil through idolatry. Hence we must say otherwise that irregularity is caused by a defect in the sacrament itself. Now when corruption of the flesh occurs outside wedlock on account of a preceding marriage, it causes no defect in the sacrament on the part of the person corrupted, but it causes a defect in the other person, because the act of one who contracts marriage terminates not in himself, but in the other party, wherefore it takes its species from its term, which, moreover, in regard to that act, is the matter as it were of the sacrament. Consequently if a woman were able to receive orders, just as her husband becomes irregular through marrying one who is not a virgin, but not through his not being a virgin when he marries, so also would a woman become irregular if she were to marry a man who is not a virgin, but not if she were no longer a virgin when she married ---unless she had been corrupted by reason of a previous marriage.
This suffices for the Reply to the First Objection.
Reply to Objection 2: In this case opinions differ. It is, however, more probable that he is not irregular, because he has not divided his flesh among several women.
Reply to Objection 3: Irregularity is not the infliction of a punishment, but the defect of a sacrament. Consequently it is not always necessary for bigamy to be voluntary in order to cause irregularity. Hence a man who marries a woman, thinking her to be a virgin, whereas she is not, becomes irregular by knowing her carnally.
Reply to Objection 4: If a woman commits fornication after being married, her husband does not become irregular on that account, unless he again knows her carnally after she has been corrupted by adultery, since otherwise the corruption of the wife nowise affects the marriage act of the husband. But though he be compelled by law to pay her the debt, or if he do so at her request, being compelled by his own conscience, even before she is convicted of adultery, he becomes irregular, albeit opinions differ on this point. However, what we have said is more probable, since here it is not a question of sin, but of signification only.
Objection 1: It would seem that bigamy is removed by Baptism. For Jerome says in his commentary on the Epistle to Titus (1:6, "the husband of one wife") that if a man has had several wives before receiving Baptism, or one before and another after Baptism, he is not a bigamist. Therefore bigamy is removed by Baptism.
Objection 2: Further, he who does what is more, does what is less. Now Baptism removes all sin, and sin is a greater thing than irregularity. Therefore it removes irregularity.
Objection 3: Further, Baptism takes away all punishment resulting from an act. Now such is the irregularity of bigamy. Therefore, etc.
Objection 4: Further, a bigamist is irregular because he is deficient in the representation of Christ. Now by Baptism we are fully conformed to Christ. Therefore this irregularity is removed.
Objection 5: Further, the sacraments of the New Law are more efficacious than the sacraments of the Old Law. But the sacraments of the Old Law removed irregularities according to the Master's statement (Sent. iv,). Therefore Baptism also, being the most efficacious of the sacraments of the New Law, removes the irregularity consequent upon bigamy.
On the contrary, Augustine says (De Bono Conjug. xviii): "Those understand the question more correctly who maintain that a man who has married a second wife, though he was a catechumen or even a pagan at the time, cannot be ordained, because it is a question of a sacrament, not of a sin."
Further, according to the same authority (De Bono Conjug. xviii) "a woman who has been corrupted while a catechumen or a pagan cannot after Baptism be consecrated among God's virgins." Therefore in like manner one who was a bigamist before Baptism cannot be ordained.
I answer that, Baptism removes sin, but does not dissolve marriage. Wherefore since irregularity results from marriage, it cannot be removed by Baptism, as Augustine says (De Bono Conjug. xviii).
Reply to Objection 1: In this case Jerome's opinion is not followed: unless perhaps he wished to explain that he means that a dispensation should be more easily granted.
Reply to Objection 2: It does not follow that what does a greater thing, does a lesser, unless it be directed to the latter. This is not so in the case in point, because Baptism is not directed to the removal of an irregularity.
Reply to Objection 3: This must be understood of punishments consequent upon actual sin, which are, or have yet to be, inflicted: for one does not recover virginity by Baptism, nor again undivision of the flesh.
Reply to Objection 4: Baptism conforms a man to Christ as regards the virtue of the mind, but not as to the condition of the body, which is effected by virginity or division of the flesh.
Reply to Objection 5: Those irregularities were contracted through slight and temporary causes, and consequently they could be removed by those sacraments. Moreover the latter were ordained for that purpose, whereas Baptism is not.
Objection 1: It would seem unlawful for a bigamist to be granted a dispensation. For it is said (Extra, De bigamis, cap. Nuper): "It is not lawful to grant a dispensation to clerics who, as far as they could do so, have taken to themselves a second wife."
Objection 2: Further, it is not lawful to grant a dispensation from the Divine law. Now whatever is in the canonical writings belongs to the Divine law. Since then in canonical Scripture the Apostle says (1Tm 3,2): "It behooveth . . . a bishop to be . . . the husband of one wife," it would seem that a dispensation cannot be granted in this matter.
Objection 3: Further, no one can receive a dispensation in what is essential to a sacrament. But it is essential to the sacrament of order that the recipient be not irregular, since the signification which is essential to a sacrament is lacking in one who is irregular. Therefore he cannot be granted a dispensation in this.
Objection 4: Further, what is reasonably done cannot be reasonably undone. If, therefore, a bigamist can lawfully receive a dispensation, it was unreasonable that he should be irregular: which is inadmissible.
On the contrary, Pope Lucius granted a dispensation to the bishop of Palermo who was a bigamist, as stated in the gloss on can. Lector, dist. 34.
Further, Pope Martin [*Martinus Bracarensis: cap. xliii] says: "If a Reader marry a widow, let him remain a Reader, or if there be need for it, he may receive the Subdiaconate, but no higher order: and the same applies if he should be a bigamist." Therefore he may at least receive a dispensation as far as the Subdiaconate.
I answer that, Irregularity attaches to bigamy not by natural, but by positive law; nor again is it one of the essentials of order that a man be not a bigamist, which is evident from the fact that if a bigamist present himself for orders, he receives the character. Wherefore the Pope can dispense altogether from such an irregularity; but a bishop, only as regards the minor orders, though some say that in order to prevent religious wandering abroad he can dispense therefrom as regards the major orders in those who wish to serve God in religion.
Reply to Objection 1: This Decretal shows that there is the same difficulty against granting a dispensation in those who have married several wives in fact, as if they had married them in law; but it does not prove that the Pope has no power to grant a dispensation in such cases.
Reply to Objection 2: This is true as regards things belonging to the natural law, and those which are essential to the sacraments, and to faith. But in those which owe their institution to the apostles, since the Church has the same power now as then of setting up and of putting down, she can grant a dispensation through him who holds the primacy.
Reply to Objection 3: Not every signification is essential to a sacrament, but that alone which belongs to the sacramental effect,* and this is not removed by irregularity. [*Leonine edition reads "officium," some read "effectum"; the meaning is the same, and is best rendered as above.]
Reply to Objection 4: In particular cases there is no ratio that applies to all equally, on account of their variety. Hence what is reasonably established for all, in consideration of what happens in the majority of cases, can be with equal reason done away in a certain definite case.
We must now consider the bill of divorce, under which head there are seven points of inquiry:
(1) Whether the indissolubility of marriage is of natural law?
(2) Whether by dispensation it may become lawful to put away a wife?
(3) Whether it was lawful under the Mosaic law?
(4) Whether a wife who has been divorced may take another husband?
(5) Whether the husband can marry again the wife whom he has divorced?
(6) Whether the cause of divorce was hatred of the wife?
(7) Whether the reasons for divorce had to be written on the bill?
Objection 1: It would seem that inseparableness of the wife is not of natural law. For the natural law is the same for all. But no law save Christ's has forbidden the divorcing of a wife. Therefore inseparableness of a wife is not of natural law.
Objection 2: Further, the sacraments are not of the natural law. But the indissolubility of marriage is one of the marriage goods. Therefore it is not of the natural law.
Objection 3: Further, the union of man and woman in marriage is chiefly directed to the begetting, rearing, and instruction of the offspring. But all things are complete by a certain time. Therefore after that time it is lawful to put away a wife without prejudice to the natural law.
Objection 4: Further, the good of the offspring is the principal end of marriage. But the indissolubility of marriage is opposed to the good of the offspring, because, according to philosophers, a certain man cannot beget offspring of a certain woman, and yet he might beget of another, even though she may have had intercourse with another man. Therefore the indissolubility of marriage is against rather than according to the natural law.
On the contrary, Those things which were assigned to nature when it was well established in its beginning belong especially to the law of nature. Now the indissolubility of marriage is one of these things according to Mt 19,4 Mt 19,6. Therefore it is of natural law.
Further, it is of natural law that man should not oppose himself to God. Yet man would, in a way, oppose himself to God if he were to sunder "what God hath joined together." Since then the indissolubility of marriage is gathered from this passage (Mt 19,6) it would seem that it is of natural law.
I answer that, By the intention of nature marriage is directed to the rearing of the offspring, not merely for a time, but throughout its whole life. Hence it is of natural law that parents should lay up for their children, and that children should be their parents' heirs (2Co 12,14). Therefore, since the offspring is the common good of husband and wife, the dictate of the natural law requires the latter to live together for ever inseparably: and so the indissolubility of marriage is of natural law.
Reply to Objection 1: Christ's law alone brought mankind "to perfection" [*Cf. He 7,19] by bringing man back to the state of the newness of nature. Wherefore neither Mosaic nor human laws could remove all that was contrary to the law of nature, for this was reserved exclusively to "the law of the spirit of life" [*Cf. Rm 8,2].
Reply to Objection 2: Indissolubility belongs to marriage in so far as the latter is a sign of the perpetual union of Christ with the Church, and in so far as it fulfills an office of nature that is directed to the good of the offspring, as stated above. But since divorce is more directly incompatible with the signification of the sacrament than with the good of the offspring, with which it is incompatible consequently, as stated above (Question , Article , ad 5), the indissolubility of marriage is implied in the good of the sacrament rather than in the good of the offspring, although it may be connected with both. And in so far as it is connected with the good of the offspring, it is of the natural law, but not as connected with the good of the sacrament.
The Reply to the Third Objection may be gathered from what has been said.
Reply to Objection 4: Marriage is chiefly directed to the common good in respect of its principal end, which is the good of the offspring; although in respect of its secondary end it is directed to the good of the contracting party, in so far as it is by its very nature a remedy for concupiscence. Hence marriage laws consider what is expedient for all rather than what may be suitable for one. Therefore although the indissolubility of marriage hinder the good of the offspring with regard to some individual, it is proportionate with the good of the offspring absolutely speaking: and for this reason the argument does not prove.
Summa - Supplement 1304