Summa Th. I-II EN Qu.103 a.2

Whether, at the time of the Law, the ceremonies of the Old Law had any power of justification?

Objection: 1. It would seem that the ceremonies of the Old Law had the power of justification at the time of the Law. Because expiation from sin and consecration pertains to justification. But it is written (Ex 39,21) that the priests and their apparel were consecrated by the sprinkling of blood and the anointing of oil; and (Lv 16,16) that, by sprinkling the blood of the calf, the priest expiated "the sanctuary from the uncleanness of the children of Israel, and from their transgressions and . . . their sins." Therefore the ceremonies of the Old Law had the power of justification.
2. Further, that by which man pleases God pertains to justification, according to Ps 10,8: "The Lord is just and hath loved justice." But some pleased God by means of ceremonies, according to Lv 10,19: "How could I . . . please the Lord in the ceremonies, having a sorrowful heart?" Therefore the ceremonies of the Old Law had the power of justification.
3. Further, things relating to the divine worship regard the soul rather than the body, according to Ps 18,8: "The Law of the Lord is unspotted, converting souls." But the leper was cleansed by means of the ceremonies of the Old Law, as stated in Lv 14. Much more therefore could the ceremonies of the Old Law cleanse the soul by justifying it.

On the contrary The Apostle says (Ga 2) [*The first words of the quotation are from Ga 3,21: St. Thomas probably quoting from memory, substituted them for Ga 2,21, which runs thus: 'If justice be by the Law, then Christ died in vain.']: "If there had been a law given which could justify [Vulg.: 'give life'], Christ died in vain," i.e. without cause. But this is inadmissible. Therefore the ceremonies of the Old Law did not confer justice.
I answer that As stated above (Question [102], Article [5], ad 4), a twofold uncleanness was distinguished in the Old Law. One was spiritual and is the uncleanness of sin. The other was corporal, which rendered a man unfit for divine worship; thus a leper, or anyone that touched carrion, was said to be unclean: and thus uncleanness was nothing but a kind of irregularity. From this uncleanness, then, the ceremonies of the Old Law had the power to cleanse: because they were ordered by the Law to be employed as remedies for the removal of the aforesaid uncleannesses which were contracted in consequence of the prescription of the Law. Hence the Apostle says (He 9,13) that "the blood of goats and of oxen, and the ashes of a heifer, being sprinkled, sanctify such as are defiled, to the cleansing of the flesh." And just as this uncleanness which was washed away by such like ceremonies, affected the flesh rather than the soul, so also the ceremonies themselves are called by the Apostle shortly before (He 9,10) justices of the flesh: "justices of the flesh," says he, "being laid on them until the time of correction."On the other hand, they had no power of cleansing from uncleanness of the soul, i.e. from the uncleanness of sin. The reason of this was that at no time could there be expiation from sin, except through Christ, "Who taketh away the sins [Vulg.: 'sin'] of the world" (Jn 1,29). And since the mystery of Christ's Incarnation and Passion had not yet really taken place, those ceremonies of the Old Law could not really contain in themselves a power flowing from Christ already incarnate and crucified, such as the sacraments of the New Law contain. Consequently they could not cleanse from sin: thus the Apostle says (He 10,4) that "it is impossible that with the blood of oxen and goats sin should be taken away"; and for this reason he calls them (Ga 4,9) "weak and needy elements": weak indeed, because they cannot take away sin; but this weakness results from their being needy, i.e. from the fact that they do not contain grace within themselves.However, it was possible at the time of the Law, for the minds of the faithful, to be united by faith to Christ incarnate and crucified; so that they were justified by faith in Christ: of which faith the observance of these ceremonies was a sort of profession, inasmuch as they foreshadowed Christ. Hence in the Old Law certain sacrifices were offered up for sins, not as though the sacrifices themselves washed sins away, but because they were professions of faith which cleansed from sin. In fact, the Law itself implies this in the terms employed: for it is written (Lv 4,26 Lv 5,16) that in offering the sacrifice for sin "the priest shall pray for him . . . and it shall be forgiven him," as though the sin were forgiven, not in virtue of the sacrifices, but through the faith and devotion of those who offered them. It must be observed, however, that the very fact that the ceremonies of the Old Law washed away uncleanness of the body, was a figure of that expiation from sins which was effected by Christ.It is therefore evident that under the state of the Old Law the ceremonies had no power of justification.

Reply to Objection: 1. That sanctification of priests and their sons, and of their apparel or of anything else belonging to them, by sprinkling them with blood, had no other effect but to appoint them to the divine worship, and to remove impediments from them, "to the cleansing of the flesh," as the Apostle states (He 9,13) in token of that sanctification whereby "Jesus" sanctified "the people by His own blood" (He 13,12). Moreover, the expiation must be understood as referring to the removal of these bodily uncleannesses, not to the forgiveness of sin. Hence even the sanctuary which could not be the subject of sin is stated to be expiated.
2. The priests pleased God in the ceremonies by their obedience and devotion, and by their faith in the reality foreshadowed; not by reason of the things considered in themselves.
3. Those ceremonies which were prescribed in the cleansing of a leper, were not ordained for the purpose of taking away the defilement of leprosy. This is clear from the fact that these ceremonies were not applied to a man until he was already healed: hence it is written (Lv 14,3-4) that the priest, "going out of the camp, when he shall find that the leprosy is cleansed, shall command him that is to be purified to offer," etc.; whence it is evident that the priest was appointed the judge of leprosy, not before, but after cleansing. But these ceremonies were employed for the purpose of taking away the uncleanness of irregularity. They do say, however, that if a priest were to err in his judgment, the leper would be cleansed miraculously by the power of God, but not in virtue of the sacrifice. Thus also it was by miracle that the thigh of the adulterous woman rotted, when she had drunk the water "on which" the priest had "heaped curses," as stated in Nb 5,19-27.

Whether the ceremonies of the Old Law ceased at the coming of Christ?

Objection: 1. It would seem that the ceremonies of the Old Law did not cease at the coming of Christ. For it is written (Ba 4,1): "This is the book of the commandments of God, and the law that is for ever." But the legal ceremonies were part of the Law. Therefore the legal ceremonies were to last for ever.
2. Further, the offering made by a leper after being cleansed was a ceremony of the Law. But the Gospel commands the leper, who has been cleansed, to make this offering (Mt 8,4). Therefore the ceremonies of the Old Law did not cease at Christ's coming.
3. Further, as long as the cause remains, the effect remains. But the ceremonies of the Old Law had certain reasonable causes, inasmuch as they were ordained to the worship of God, besides the fact that they were intended to be figures of Christ. Therefore the ceremonies of the Old Law should not have ceased.
4. Further, circumcision was instituted as a sign of Abraham's faith: the observance of the sabbath, to recall the blessing of creation: and other solemnities, in memory of other Divine favors, as state above (Question [102], Article [4], ad 10; Article [5], ad 1). But Abraham's faith is ever to be imitated even by us: and the blessing of creation and other Divine favors should never be forgotten. Therefore at least circumcision and the other legal solemnities should not have ceased.

On the contrary The Apostle says (Col 2,16-17): "Let no man . . . judge you in meat or in drink, or in respect of a festival day, or of the new moon, or of the sabbaths, which are a shadow of things to come": and (He 8,13): "In saying a new (testament), he hath made the former old: and that which decayeth and groweth old, is near its end."
I answer that All the ceremonial precepts of the Old Law were ordained to the worship of God as stated above (Question [101], Articles [1],2). Now external worship should be in proportion to the internal worship, which consists in faith, hope and charity. Consequently exterior worship had to be subject to variations according to the variations in the internal worship, in which a threefold state may be distinguished. One state was in respect of faith and hope, both in heavenly goods, and in the means of obtaining them---in both of these considered as things to come. Such was the state of faith and hope in the Old Law. Another state of interior worship is that in which we have faith and hope in heavenly goods as things to come; but in the means of obtaining heavenly goods, as in things present or past. Such is the state of the New Law. The third state is that in which both are possessed as present; wherein nothing is believed in as lacking, nothing hoped for as being yet to come. Such is the state of the Blessed.In this state of the Blessed, then, nothing in regard to worship of God will be figurative; there will be naught but "thanksgiving and voice of praise" (Is 51,3). Hence it is written concerning the city of the Blessed (Ap 21,22): "I saw no temple therein: for the Lord God Almighty is the temple thereof, and the Lamb." Proportionately, therefore, the ceremonies of the first-mentioned state which foreshadowed the second and third states, had need to cease at the advent of the second state; and other ceremonies had to be introduced which would be in keeping with the state of divine worship for that particular time, wherein heavenly goods are a thing of the future, but the Divine favors whereby we obtain the heavenly boons are a thing of the present.

Reply to Objection: 1. The Old Law is said to be "for ever" simply and absolutely, as regards its moral precepts; but as regards the ceremonial precepts it lasts for even in respect of the reality which those ceremonies foreshadowed.
2. The mystery of the redemption of the human race was fulfilled in Christ's Passion: hence Our Lord said then: "It is consummated" (Jn 19,30). Consequently the prescriptions of the Law must have ceased then altogether through their reality being fulfilled. As a sign of this, we read that at the Passion of Christ "the veil of the temple was rent" (Mt 27,51). Hence, before Christ's Passion, while Christ was preaching and working miracles, the Law and the Gospel were concurrent, since the mystery of Christ had already begun, but was not as yet consummated. And for this reason Our Lord, before His Passion, commanded the leper to observe the legal ceremonies.
3. The literal reasons already given (Question [102]) for the ceremonies refer to the divine worship, which was founded on faith in that which was to come. Hence, at the advent of Him Who was to come, both that worship ceased, and all the reasons referring thereto.
4. The faith of Abraham was commended in that he believed in God's promise concerning his seed to come, in which all nations were to blessed. Wherefore, as long as this seed was yet to come, it was necessary to make profession of Abraham's faith by means of circumcision. But now that it is consummated, the same thing needs to be declared by means of another sign, viz. Baptism, which, in this respect, took the place of circumcision, according to the saying of the Apostle (Col 2,11-12): "You are circumcised with circumcision not made by hand, in despoiling of the body of the flesh, but in the circumcision of Christ, buried with Him in Baptism."As to the sabbath, which was a sign recalling the first creation, its place is taken by the "Lord's Day," which recalls the beginning of the new creature in the Resurrection of Christ. In like manner other solemnities of the Old Law are supplanted by new solemnities: because the blessings vouchsafed to that people, foreshadowed the favors granted us by Christ. Hence the feast of the Passover gave place to the feast of Christ's Passion and Resurrection: the feast of Pentecost when the Old Law was given, to the feast of Pentecost on which was given the Law of the living spirit: the feast of the New Moon, to Lady Day, when appeared the first rays of the sun, i.e. Christ, by the fulness of grace: the feast of Trumpets, to the feasts of the Apostles: the feast of Expiation, to the feasts of Martyrs and Confessors: the feast of Tabernacles, to the feast of the Church Dedication: the feast of the Assembly and Collection, to feast of the Angels, or else to the feast of All Hallows.

Whether since Christ's Passion the legal ceremonies can be observed without committing mortal sin?

Objection: 1. It would seem that since Christ's Passion the legal ceremonies can be observed without committing mortal sin. For we must not believe that the apostles committed mortal sin after receiving the Holy Ghost: since by His fulness they were "endued with power from on high" (Lc 24,49). But the apostles observed the legal ceremonies after the coming of the Holy Ghost: for it is stated (Ac 16,3) that Paul circumcised Timothy: and (Ac 21,26) that Paul, at the advice of James, "took the men, and . . . being purified with them, entered into the temple, giving notice of the accomplishment of the days of purification, until an oblation should be offered for every one of them." Therefore the legal ceremonies can be observed since the Passion of Christ without mortal sin.
2. Further, one of the legal ceremonies consisted in shunning the fellowship of Gentiles. But the first Pastor of the Church complied with this observance; for it is stated (Ga 2,12) that, "when" certain men "had come" to Antioch, Peter "withdrew and separated himself" from the Gentiles. Therefore the legal ceremonies can be observed since Christ's Passion without committing mortal sin.
3. Further, the commands of the apostles did not lead men into sin. But it was commanded by apostolic decree that the Gentiles should observe certain ceremonies of the Law: for it is written (Ac 15,28-29): "It hath seemed good to the Holy Ghost and to us, to lay no further burden upon you than these necessary things: that you abstain from things sacrificed to idols, and from blood, and from things strangled, and from fornication." Therefore the legal ceremonies can be observed since Christ's Passion without committing mortal sin.

On the contrary The Apostle says (Ga 5,2): "If you be circumcised, Christ shall profit you nothing." But nothing save mortal sin hinders us from receiving Christ's fruit. Therefore since Christ's Passion it is a mortal sin to be circumcised, or to observe the other legal ceremonies.
I answer that All ceremonies are professions of faith, in which the interior worship of God consists. Now man can make profession of his inward faith, by deeds as well as by words: and in either profession, if he make a false declaration, he sins mortally. Now, though our faith in Christ is the same as that of the fathers of old; yet, since they came before Christ, whereas we come after Him, the same faith is expressed in different words, by us and by them. For by them was it said: "Behold a virgin shall conceive and bear a son," where the verbs are in the future tense: whereas we express the same by means of verbs in the past tense, and say that she "conceived and bore." In like manner the ceremonies of the Old Law betokened Christ as having yet to be born and to suffer: whereas our sacraments signify Him as already born and having suffered. Consequently, just as it would be a mortal sin now for anyone, in making a profession of faith, to say that Christ is yet to be born, which the fathers of old said devoutly and truthfully; so too it would be a mortal sin now to observe those ceremonies which the fathers of old fulfilled with devotion and fidelity. Such is the teaching Augustine (Contra Faust. xix, 16), who says: "It is no longer promised that He shall be born, shall suffer and rise again, truths of which their sacraments were a kind of image: but it is declared that He is already born, has suffered and risen again; of which our sacraments, in which Christians share, are the actual representation."

Reply to Objection: 1. On this point there seems to have been a difference of opinion between Jerome and Augustine. For Jerome (Super Galat. ii, 11, seqq.) distinguished two periods of time. One was the time previous to Christ's Passion, during which the legal ceremonies were neither dead, since they were obligatory, and did expiate in their own fashion; nor deadly, because it was not sinful to observe them. But immediately after Christ's Passion they began to be not only dead, so as no longer to be either effectual or binding; but also deadly, so that whoever observed them was guilty of mortal sin. Hence he maintained that after the Passion the apostles never observed the legal ceremonies in real earnest; but only by a kind of pious pretense, lest, to wit, they should scandalize the Jews and hinder their conversion. This pretense, however, is to be understood, not as though they did not in reality perform those actions, but in the sense that they performed them without the mind to observe the ceremonies of the Law: thus a man might cut away his foreskin for health's sake, not with the intention of observing legal circumcision.But since it seems unbecoming that the apostles, in order to avoid scandal, should have hidden things pertaining to the truth of life and doctrine, and that they should have made use of pretense, in things pertaining to the salvation of the faithful; therefore Augustine (Epist. lxxxii) more fittingly distinguished three periods of time. One was the time that preceded the Passion of Christ, during which the legal ceremonies were neither deadly nor dead: another period was after the publication of the Gospel, during which the legal ceremonies are both dead and deadly. The third is a middle period, viz. from the Passion of Christ until the publication of the Gospel, during which the legal ceremonies were dead indeed, because they had neither effect nor binding force; but were not deadly, because it was lawful for the Jewish converts to Christianity to observe them, provided they did not put their trust in them so as to hold them to be necessary unto salvation, as though faith in Christ could not justify without the legal observances. On the other hand, there was no reason why those who were converted from heathendom to Christianity should observe them. Hence Paul circumcised Timothy, who was born of a Jewish mother; but was unwilling to circumcise Titus, who was of heathen nationality.The reason why the Holy Ghost did not wish the converted Jews to be debarred at once from observing the legal ceremonies, while converted heathens were forbidden to observe the rites of heathendom, was in order to show that there is a difference between these rites. For heathenish ceremonial was rejected as absolutely unlawful, and as prohibited by God for all time; whereas the legal ceremonial ceased as being fulfilled through Christ's Passion, being instituted by God as a figure of Christ.
2. According to Jerome, Peter withdrew himself from the Gentiles by pretense, in order to avoid giving scandal to the Jews, of whom he was the Apostle. Hence he did not sin at all in acting thus. On the other hand, Paul in like manner made a pretense of blaming him, in order to avoid scandalizing the Gentiles, whose Apostle he was. But Augustine disapproves of this solution: because in the canonical Scripture (viz. Ga 2,11), wherein we must not hold anything to be false, Paul says that Peter "was to be blamed." Consequently it is true that Peter was at fault: and Paul blamed him in very truth and not with pretense. Peter, however, did not sin, by observing the legal ceremonial for the time being; because this was lawful for him who was a converted Jew. But he did sin by excessive minuteness in the observance of the legal rites lest he should scandalize the Jews, the result being that he gave scandal to the Gentiles.
3. Some have held that this prohibition of the apostles is not to be taken literally, but spiritually: namely, that the prohibition of blood signifies the prohibition of murder; the prohibition of things strangled, that of violence and rapine; the prohibition of things offered to idols, that of idolatry; while fornication is forbidden as being evil in itself: which opinion they gathered from certain glosses, which expound these prohibitions in a mystical sense. Since, however, murder and rapine were held to be unlawful even by the Gentiles, there would have been no need to give this special commandment to those who were converted to Christ from heathendom. Hence others maintain that those foods were forbidden literally, not to prevent the observance of legal ceremonies, but in order to prevent gluttony. Thus Jerome says on Ez 44,31 ("The priest shall not eat of anything that is dead"): "He condemns those priests who from gluttony did not keep these precepts."But since certain foods are more delicate than these and more conducive to gluttony, there seems no reason why these should have been forbidden more than the others.We must therefore follow the third opinion, and hold that these foods were forbidden literally, not with the purpose of enforcing compliance with the legal ceremonies, but in order to further the union of Gentiles and Jews living side by side. Because blood and things strangled were loathsome to the Jews by ancient custom; while the Jews might have suspected the Gentiles of relapse into idolatry if the latter had partaken of things offered to idols. Hence these things were prohibited for the time being, during which the Gentiles and Jews were to become united together. But as time went on, with the lapse of the cause, the effect lapsed also, when the truth of the Gospel teaching was divulged, wherein Our Lord taught that "not that which entereth into the mouth defileth a man" (Mt 15,11); and that "nothing is to be rejected that is received with thanksgiving" (1Tm 4,4). With regard to fornication a special prohibition was made, because the Gentiles did not hold it to be sinful.


We must now consider the judicial precepts: and first of all we shall consider them in general; in the second place we shall consider their reasons. Under the first head there are four points of inquiry:

(1) What is meant by the judicial precepts?

(2) Whether they are figurative?

(3) Their duration;

(4) Their division.

Whether the judicial precepts were those which directed man in relation to his neighbor?

Objection: 1. It would seem that the judicial precepts were not those which directed man in his relations to his neighbor. For judicial precepts take their name from "judgment." But there are many things that direct man as to his neighbor, which are not subordinate to judgment. Therefore the judicial precepts were not those which directed man in his relations to his neighbor.
2. Further, the judicial precepts are distinct from the moral precepts, as stated above (Question [99], Article [4]). But there are many moral precepts which direct man as to his neighbor: as is evidently the case with the seven precepts of the second table. Therefore the judicial precepts are not so called from directing man as to his neighbor.
3. Further, as the ceremonial precepts relate to God, so do the judicial precepts relate to one's neighbor, as stated above (Question [99], Article [4]; Question [101], Article [1]). But among the ceremonial precepts there are some which concern man himself, such as observances in matter of food and apparel, of which we have already spoken (Question [102], Article [6], ad 1,6). Therefore the judicial precepts are not so called from directing man as to his neighbor.

On the contrary It is reckoned (Ez 18,8) among other works of a good and just man, that "he hath executed true judgment between man and man." But judicial precepts are so called from "judgment." Therefore it seems that the judicial precepts were those which directed the relations between man and man.
I answer that As is evident from what we have stated above (Question [95], Article [2]; Question [99], Article [4]), in every law, some precepts derive their binding force from the dictate of reason itself, because natural reason dictates that something ought to be done or to be avoided. These are called "moral" precepts: since human morals are based on reason. At the same time there are other precepts which derive their binding force, not from the very dictate of reason (because, considered in themselves, they do not imply an obligation of something due or undue); but from some institution, Divine or human: and such are certain determinations of the moral precepts. When therefore the moral precepts are fixed by Divine institution in matters relating to man's subordination to God, they are called "ceremonial" precepts: but when they refer to man's relations to other men, they are called "judicial" precepts. Hence there are two conditions attached to the judicial precepts: viz. first, that they refer to man's relations to other men; secondly, that they derive their binding force not from reason alone, but in virtue of their institution.

Reply to Objection: 1. Judgments emanate through the official pronouncement of certain men who are at the head of affairs, and in whom the judicial power is vested. Now it belongs to those who are at the head of affairs to regulate not only litigious matters, but also voluntary contracts which are concluded between man and man, and whatever matters concern the community at large and the government thereof. Consequently the judicial precepts are not only those which concern actions at law; but also all those that are directed to the ordering of one man in relation to another, which ordering is subject to the direction of the sovereign as supreme judge.
2. This argument holds in respect of those precepts which direct man in his relations to his neighbor, and derive their binding force from the mere dictate of reason.
3. Even in those precepts which direct us to God, some are moral precepts, which the reason itself dictates when it is quickened by faith; such as that God is to be loved and worshipped. There are also ceremonial precepts, which have no binding force except in virtue of their Divine institution. Now God is concerned not only with the sacrifices that are offered to Him, but also with whatever relates to the fitness of those who offer sacrifices to Him and worship Him. Because men are ordained to God as to their end; wherefore it concerns God and, consequently, is a matter of ceremonial precept, that man should show some fitness for the divine worship. On the other hand, man is not ordained to his neighbor as to his end, so as to need to be disposed in himself with regard to his neighbor, for such is the relationship of a slave to his master, since a slave "is his master's in all that he is," as the Philosopher says (Polit. i, 2). Hence there are no judicial precepts ordaining man in himself; all such precepts are moral: because the reason, which is the principal in moral matters, holds the same position, in man, with regard to things that concern him, as a prince or judge holds in the state. Nevertheless we must take note that, since the relations of man to his neighbor are more subject to reason than the relations of man to God, there are more precepts whereby man is directed in his relations to his neighbor, than whereby he is directed to God. For the same reason there had to be more ceremonial than judicial precepts in the Law.

Whether the judicial precepts were figurative?

Objection: 1. It would seem that the judicial precepts were not figurative. Because it seems proper to the ceremonial precepts to be instituted as figures of something else. Therefore, if the judicial precepts are figurative, there will be no difference between the judicial and ceremonial precepts.
2. Further, just as certain judicial precepts were given to the Jewish people, so also were some given to other heathen peoples. But the judicial precepts given to other peoples were not figurative, but stated what had to be done. Therefore it seems that neither were the judicial precepts of the Old Law figures of anything.
3. Further, those things which relate to the divine worship had to be taught under certain figures, because the things of God are above our reason, as stated above (Question [101], Article [2], ad 2). But things concerning our neighbor are not above our reason. Therefore the judicial precepts which direct us in relation to our neighbor should not have been figurative.

On the contrary The judicial precepts are expounded both in the allegorical and in the moral sense (Ex 21).
I answer that A precept may be figurative in two ways. First, primarily and in itself: because, to wit, it is instituted principally that it may be the figure of something. In this way the ceremonial precepts are figurative; since they were instituted for the very purpose that they might foreshadow something relating to the worship of God and the mystery of Christ. But some precepts are figurative, not primarily and in themselves, but consequently. In this way the judicial precepts of the Old Law are figurative. For they were not instituted for the purpose of being figurative, but in order that they might regulate the state of that people according to justice and equity. Nevertheless they did foreshadow something consequently: since, to wit, the entire state of that people, who were directed by these precepts, was figurative, according to 1Co 10,11: "All . . . things happened to them in figure."

Reply to Objection: 1. The ceremonial precepts are not figurative in the same way as the judicial precepts, as explained above.
2. The Jewish people were chosen by God that Christ might be born of them. Consequently the entire state of that people had to be prophetic and figurative, as Augustine states (Contra Faust. xxii, 24). For this reason even the judicial precepts that were given to this people were more figurative that those which were given to other nations. Thus, too, the wars and deeds of this people are expounded in the mystical sense: but not the wars and deeds of the Assyrians or Romans, although the latter are more famous in the eyes of men.
3. In this people the direction of man in regard to his neighbor, considered in itself, was subject to reason. But in so far as it was referred to the worship of God, it was above reason: and in this respect it was figurative.

Whether the judicial precepts of the Old Law bind for ever?

Objection: 1. It would seem that the judicial precepts of the Old Law bind for ever. Because the judicial precepts relate to the virtue of justice: since a judgment is an execution of the virtue of justice. Now "justice is perpetual and immortal" (Sg 1,15). Therefore the judicial precepts bind for ever.
2. Further, Divine institutions are more enduring than human institutions. But the judicial precepts of human laws bind for ever. Therefore much more do the judicial precepts of the Divine Law.
3. Further, the Apostle says (He 7,18) that "there is a setting aside of the former commandment, because of the weakness and unprofitableness thereof." Now this is true of the ceremonial precept, which "could [Vulg.: 'can'] not, as to the conscience, make him perfect that serveth only in meats and in drinks, and divers washings and justices of the flesh," as the Apostle declares (He 9,9-10). On the other hand, the judicial precepts were useful and efficacious in respect of the purpose for which they were instituted, viz. to establish justice and equity among men. Therefore the judicial precepts of the Old Law are not set aside, but still retain their efficacy.

On the contrary The Apostle says (He 7,12) that "the priesthood being translated it is necessary that a translation also be made of the Law." But the priesthood was transferred from Aaron to Christ. Therefore the entire Law was also transferred. Therefore the judicial precepts are no longer in force.
I answer that The judicial precepts did not bind for ever, but were annulled by the coming of Christ: yet not in the same way as the ceremonial precepts. For the ceremonial precepts were annulled so far as to be not only "dead," but also deadly to those who observe them since the coming of Christ, especially since the promulgation of the Gospel. On the other hand, the judicial precepts are dead indeed, because they have no binding force: but they are not deadly. For if a sovereign were to order these judicial precepts to be observed in his kingdom, he would not sin: unless perchance they were observed, or ordered to be observed, as though they derived their binding force through being institutions of the Old Law: for it would be a deadly sin to intend to observe them thus.The reason for this difference may be gathered from what has been said above (Article [2]). For it has been stated that the ceremonial precepts are figurative primarily and in themselves, as being instituted chiefly for the purpose of foreshadowing the mysteries of Christ to come. On the other hand, the judicial precepts were not instituted that they might be figures, but that they might shape the state of that people who were directed to Christ. Consequently, when the state of that people changed with the coming of Christ, the judicial precepts lost their binding force: for the Law was a pedagogue, leading men to Christ, as stated in Ga 3,24. Since, however, these judicial precepts are instituted, not for the purpose of being figures, but for the performance of certain deeds, the observance thereof is not prejudicial to the truth of faith. But the intention of observing them, as though one were bound by the Law, is prejudicial to the truth of faith: because it would follow that the former state of the people still lasts, and that Christ has not yet come.

Reply to Objection: 1. The obligation of observing justice is indeed perpetual. But the determination of those things that are just, according to human or Divine institution, must needs be different, according to the different states of mankind.
2. The judicial precepts established by men retain their binding force for ever, so long as the state of government remains the same. But if the state or nation pass to another form of government, the laws must needs be changed. For democracy, which is government by the people, demands different laws from those of oligarchy, which is government by the rich, as the Philosopher shows (Polit. iv, 1). Consequently when the state of that people changed, the judicial precepts had to be changed also.
3. Those judicial precepts directed the people to justice and equity, in keeping with the demands of that state. But after the coming of Christ, there had to be a change in the state of that people, so that in Christ there was no distinction between Gentile and Jew, as there had been before. For this reason the judicial precepts needed to be changed also.

Summa Th. I-II EN Qu.103 a.2