Of the Reason for the Judicial Precepts

This people was governed under the special care of God: wherefore it is written (Deut. 7:6): "The Lord thy God hath chosen thee to be His peculiar people": and this is why the Lord reserved to Himself the institution of the chief ruler. For this too did Moses pray (Num. 27:16): "May the Lord the God of the spirits of all the flesh provide a man, that may be over this multitude." Thus by God's orders Josue was set at the head in place of Moses; and we read about each of the judges who succeeded Josue that God "raised . . . up a saviour" for the people, and that "the spirit of the Lord was" in them (Judges 3:9, 10, 15). Hence the Lord did not leave the choice of a king to the people; but reserved this to Himself, as appears from Deut. 17:15: "Thou shalt set him whom the Lord thy God shall choose."

A kingdom is the best form of government of the people, so long as it is not corrupt. But since the power granted to a king is so great, it easily degenerates into tyranny, unless he to whom this power is given be a very virtuous man: for it is only the virtuous man that conducts himself well in the midst of prosperity, as the Philosopher observes (Ethic. iv, 3). Now perfect virtue is to be found in few: and especially were the Jews inclined to cruelty and avarice, which vices above all turn men into tyrants. Hence from the very first the Lord did not set up the kingly authority with full power, but gave them judges and governors to rule them. But afterwards when the people asked Him to do so, being indignant with them, so to speak, He granted them a king, as is clear from His words to Samuel (1 Kings 8:7): "They have not rejected thee, but Me, that I should not reign over them."

Nevertheless, as regards the appointment of a king, He did establish the manner of election from the very beginning (Deut. 17:14, seqq.): and then He determined two points: first, that in choosing a king they should wait for the Lord's decision; and that they should not make a man of another nation king, because such kings are wont to take little interest in the people they are set over, and consequently to have no care for their welfare: secondly, He prescribed how the king after his appointment should behave, in regard to himself; namely, that he should not accumulate chariots and horses, nor wives, nor immense wealth: because through craving for such things princes become tyrants and forsake justice. He also appointed the manner in which they were to conduct themselves towards God: namely, that they should continually read and ponder on God's Law, and should ever fear and obey God. Moreover, He decided how they should behave towards their subjects: namely, that they should not proudly despise them, or ill-treat them, and that they should not depart from the paths of justice.

The division of the kingdom, and a number of kings, was rather a punishment inflicted on that people for their many dissensions, specially against the just rule of David, than a benefit conferred on them for their profit. Hence it is written (Osee 13:11): "I will give thee a king in My wrath"; and (Osee 8:4): "They have reigned, but not by Me: they have been princes, and I knew not."

The priestly office was bequeathed by succession from father to son: and this, in order that it might be held in greater respect, if not any man from the people could become a priest: since honor was given to them out of reverence for the divine worship. Hence it was necessary to put aside certain things for them both as to tithes and as to first-fruits, and, again, as to oblations and sacrifices, that they might be afforded a means of livelihood. On the other hand, the rulers, as stated above, were chosen from the whole people; wherefore they had their own possessions, from which to derive a living: and so much the more, since the Lord forbade even a king to have superabundant wealth to make too much show of magnificence: both because he could scarcely avoid the excesses of pride and tyranny, arising from such things, and because, if the rulers were not very rich, and if their office involved much work and anxiety, it would not tempt the ambition of the common people; and would not become an occasion of sedition.

That right was not given to the king by Divine institution: rather was it foretold that kings would usurp that right, by framing unjust laws, and by degenerating into tyrants who preyed on their subjects. This is clear from the context that follows: "And you shall be his slaves [Douay: 'servants']": which is significative of tyranny, since a tyrant rules is subjects as though they were his slaves. Hence Samuel spoke these words to deter them from asking for a king; since the narrative continues: "But the people would not hear the voice of Samuel." It may happen, however, that even a good king, without being a tyrant, may take away the sons, and make them tribunes and centurions; and may take many things from his subjects in order to secure the common weal.

As the Apostle says (Rom. 13:8), "he that loveth his neighbor hath fulfilled the Law": because, to wit, all the precepts of the Law, chiefly those concerning our neighbor, seem to aim at the end that men should love one another. Now it is an effect of love that men give their own goods to others: because, as stated in 1 John 3:17: "He that . . . shall see his brother in need, and shall shut up his bowels from him: how doth the charity of God abide in him?" Hence the purpose of the Law was to accustom men to give of their own to others readily: thus the Apostle (1 Tim. 6:18) commands the rich "to give easily and to communicate to others." Now a man does not give easily to others if he will not suffer another man to take some little thing from him without any great injury to him. And so the Law laid down that it should be lawful for a man, on entering his neighbor's vineyard, to eat of the fruit there: but not to carry any away, lest this should lead to the infliction of a grievous harm, and cause a disturbance of the peace: for among well-behaved people, the taking of a little does not disturb the peace; in fact, it rather strengthens friendship and accustoms men to give things to one another.

The Law did not prescribe that women should succeed to their father's estate except in default of male issue: failing which it was necessary that succession should be granted to the female line in order to comfort the father, who would have been sad to think that his estate would pass to strangers. Nevertheless the Law observed due caution in the matter, by providing that those women who succeeded to their father's estate, should marry within their own tribe, in order to avoid confusion of tribal possessions, as stated in Num. 36:7, 8.

As the Philosopher says (Polit. ii, 4), the regulation of possessions conduces much to the preservation of a state or nation. Consequently, as he himself observes, it was forbidden by the law in some of the heathen states, "that anyone should sell his possessions, except to avoid a manifest loss." For if possessions were to be sold indiscriminately, they might happen to come into the hands of a few: so that it might become necessary for a state or country to become void of inhabitants. Hence the Old Law, in order to remove this danger, ordered things in such a way that while provision was made for men's needs, by allowing the sale of possessions to avail for a certain period, at the same time the said danger was removed, by prescribing the return of those possessions after that period had elapsed. The reason for this law was to prevent confusion of possessions, and to ensure the continuance of a definite distinction among the tribes.

But as the town houses were not allotted to distinct estates, therefore the Law allowed them to be sold in perpetuity, like movable goods. Because the number of houses in a town was not fixed, whereas there was a fixed limit to the amount of estates, which could not be exceeded, while the number of houses in a town could be increased. On the other hand, houses situated not in a town, but "in a village that hath no walls," could not be sold in perpetuity: because such houses are built merely with a view to the cultivation and care of possessions; wherefore the Law rightly made the same prescription in regard to both (Lev. 25).

As stated above (ad 1), the purpose of the Law was to accustom men to its precepts, so as to be ready to come to one another's assistance: because this is a very great incentive to friendship. The Law granted these facilities for helping others in the matter not only of gratuitous and absolute donations, but also of mutual transfers: because the latter kind of succor is more frequent and benefits the greater number: and it granted facilities for this purpose in many ways. First of all by prescribing that men should be ready to lend, and that they should not be less inclined to do so as the year of remission drew nigh, as stated in Deut. 15:7, seqq. Secondly, by forbidding them to burden a man to whom they might grant a loan, either by exacting usury, or by accepting necessities of life in security; and by prescribing that when this had been done they should be restored at once. For it is written (Deut. 23:19): "Thou shalt not lend to thy brother money to usury": and (Deut. 24:6): "Thou shalt not take the nether nor the upper millstone to pledge; for he hath pledged his life to thee": and (Ex. 22:26): "If thou take of thy neighbor a garment in pledge, thou shalt give it him again before sunset." Thirdly, by forbidding them to be importunate in exacting payment. Hence it is written (Ex. 22:25): "If thou lend money to any of my people that is poor that dwelleth with thee, thou shalt not be hard upon them as an extortioner." For this reason, too, it is enacted (Deut. 24:10, 11): "When thou shalt demand of thy neighbor anything that he oweth thee, thou shalt not go into his house to take away a pledge, but thou shalt stand without, and he shall bring out to thee what he hath": both because a man's house is his surest refuge, wherefore it is offensive to a man to be set upon in his own house; and because the Law does not allow the creditor to take away whatever he likes in security, but rather permits the debtor to give what he needs least. Fourthly, the Law prescribed that debts should cease together after the lapse of seven years. For it was probable that those who could conveniently pay their debts, would do so before the seventh year, and would not defraud the lender without cause. But if they were altogether insolvent, there was the same reason for remitting the debt from love for them, as there was for renewing the loan on account of their need.

As regards animals granted in loan, the Law enacted that if, through the neglect of the person to whom they were lent, they perished or deteriorated in his absence, he was bound to make restitution. But if they perished or deteriorated while he was present and taking proper care of them, he was not bound to make restitution, especially if they were hired for a consideration: because they might have died or deteriorated in the same way if they had remained in possession of the lender, so that if the animal had been saved through being lent, the lender would have gained something by the loan which would no longer have been gratuitous. And especially was this to be observed when animals were hired for a consideration: because then the owner received a certain price for the use of the animals; wherefore he had no right to any profit, by receiving indemnity for the animal, unless the person who had charge of it were negligent. In the case, however, of animals not hired for a consideration, equity demanded that he should receive something by way of restitution at least to the value of the hire of the animal that had perished or deteriorated.

The difference between a loan and a deposit is that a loan is in respect of goods transferred for the use of the person to whom they are transferred, whereas a deposit is for the benefit of the depositor. Hence in certain cases there was a stricter obligation of returning a loan than of restoring goods held in deposit. Because the latter might be lost in two ways. First, unavoidably: i.e. either through a natural cause, for instance if an animal held in deposit were to die or depreciate in value; or through an extrinsic cause, for instance, if it were taken by an enemy, or devoured by a beast (in which case, however, a man was bound to restore to the owner what was left of the animal thus slain): whereas in the other cases mentioned above, he was not bound to make restitution; but only to take an oath in order to clear himself of suspicion. Secondly, the goods deposited might be lost through an avoidable cause, for instance by theft: and then the depositary was bound to restitution on account of his neglect. But, as stated above (ad 4), he who held an animal on loan, was bound to restitution, even if he were absent when it depreciated or died: because he was held responsible for less negligence than a depositary, who was only held responsible in case of theft.

Workmen who offer their labor for hire, are poor men who toil for their daily bread: and therefore the Law commanded wisely that they should be paid at once, lest they should lack food. But they who offer other commodities for hire, are wont to be rich: nor are they in such need of their price in order to gain a livelihood: and consequently the comparison does not hold.

The purpose for which judges are appointed among men, is that they may decide doubtful points in matters of justice. Now a matter may be doubtful in two ways. First, among simple-minded people: and in order to remove doubts of this kind, it was prescribed (Deut. 16:18) that "judges and magistrates" should be appointed in each tribe, "to judge the people with just judgment." Secondly, a matter may be doubtful even among experts: and therefore, in order to remove doubts of this kind, the Law prescribed that all should foregather in some chief place chosen by God, where there would be both the high-priest, who would decide doubtful matters relating to the ceremonies of divine worship; and the chief judge of the people, who would decide matters relating to the judgments of men: just as even now cases are taken from a lower to a higher court either by appeal or by consultation. Hence it is written (Deut. 17:8, 9): "If thou perceive that there be among you a hard and doubtful matter in judgment . . . and thou see that the words of the judges within thy gates do vary; arise and go up to the place, which the Lord thy God shall choose; and thou shalt come to the priests of the Levitical race, and to the judge that shall be at that time." But such like doubtful matters did not often occur for judgment: wherefore the people were not burdened on this account.

In the business affairs of men, there is no such thing as demonstrative and infallible proof, and we must be content with a certain conjectural probability, such as that which an orator employs to persuade. Consequently, although it is quite possible for two or three witnesses to agree to a falsehood, yet it is neither easy nor probable that they succeed in so doing: wherefore their testimony is taken as being true, especially if they do not waver in giving it, or are not otherwise suspect. Moreover, in order that witnesses might not easily depart from the truth, the Law commanded that they should be most carefully examined, and that those who were found untruthful should be severely punished, as stated in Deut. 19:16, seqq.

There was, however, a reason for fixing on this particular number, in token of the unerring truth of the Divine Persons, Who are sometimes mentioned as two, because the Holy Ghost is the bond of the other two Persons; and sometimes as three: as Augustine observes on John 8:17: "In your law it is written that the testimony of two men is true."

A severe punishment is inflicted not only on account of the gravity of a fault, but also for other reasons. First, on account of the greatness of the sin, because a greater sin, other things being equal, deserves a greater punishment. Secondly, on account of a habitual sin, since men are not easily cured of habitual sin except by severe punishments. Thirdly, on account of a great desire for or a great pleasure in the sin: for men are not easily deterred from such sins unless they be severely punished. Fourthly, on account of the facility of committing a sin and of concealing it: for such like sins, when discovered, should be more severely punished in order to deter others from committing them.

Again, with regard to the greatness of a sin, four degrees may be observed, even in respect of one single deed. The first is when a sin is committed unwillingly; because then, if the sin be altogether involuntary, man is altogether excused from punishment; for it is written (Deut. 22:25, seqq.) that a damsel who suffers violence in a field is not guilty of death, because "she cried, and there was no man to help her." But if a man sinned in any way voluntarily, and yet through weakness, as for instance when a man sins from passion, the sin is diminished: and the punishment, according to true judgment, should be diminished also; unless perchance the common weal requires that the sin be severely punished in order to deter others from committing such sins, as stated above. The second degree is when a man sins through ignorance: and then he was held to be guilty to a certain extent, on account of his negligence in acquiring knowledge: yet he was not punished by the judges but expiated his sin by sacrifices. Hence it is written (Lev. 4:2): "The soul that sinneth through ignorance," etc. This is, however, to be taken as applying to ignorance of fact; and not to ignorance of the Divine precept, which all were bound to know. The third degree was when a man sinned from pride, i.e. through deliberate choice or malice: and then he was punished according to the greatness of the sin [Cf. Deut. 25:2]. The fourth degree was when a man sinned from stubbornness or obstinacy: and then he was to be utterly cut off as a rebel and a destroyer of the commandment of the Law [Cf. Num. 15:30, 31].

Accordingly we must say that, in appointing the punishment for theft, the Law considered what would be likely to happen most frequently (Ex. 22:1-9): wherefore, as regards theft of other things which can easily be safeguarded from a thief, the thief restored only twice their value. But sheep cannot be easily safeguarded from a thief, because they graze in the fields: wherefore it happened more frequently that sheep were stolen in the fields. Consequently the Law inflicted a heavier penalty, by ordering four sheep to be restored for the theft of one. As to cattle, they were yet more difficult to safeguard, because they are kept in the fields, and do not graze in flocks as sheep do; wherefore a yet more heavy penalty was inflicted in their regard, so that five oxen were to be restored for one ox. And this I say, unless perchance the animal itself were discovered in the thief's possession: because in that case he had to restore only twice the number, as in the case of other thefts: for there was reason to presume that he intended to restore the animal, since he kept it alive. Again, we might say, according to a gloss, that "a cow is useful in five ways: it may be used for sacrifice, for ploughing, for food, for milk, and its hide is employed for various purposes": and therefore for one cow five had to be restored. But the sheep was useful in four ways: "for sacrifice, for meat, for milk, and for its wool." The unruly son was slain, not because he ate and drank: but on account of his stubbornness and rebellion, which was always punished by death, as stated above. As to the man who gathered sticks on the sabbath, he was stoned as a breaker of the Law, which commanded the sabbath to be observed, to testify the belief in the newness of the world, as stated above (Q. 100, A. 5): wherefore he was slain as an unbeliever.

The Old Law inflicted the death penalty for the more grievous crimes, viz. for those which are committed against God, and for murder, for stealing a man, irreverence towards one's parents, adultery and incest. In the case of thief of other things it inflicted punishment by indemnification: while in the case of blows and mutilation it authorized punishment by retaliation; and likewise for the sin of bearing false witness. In other faults of less degree it prescribed the punishment of stripes or of public disgrace.

The punishment of slavery was prescribed by the Law in two cases. First, in the case of a slave who was unwilling to avail himself of the privilege granted by the Law, whereby he was free to depart in the seventh year of remission: wherefore he was punished by remaining a slave for ever. Secondly, in the case of a thief, who had not wherewith to make restitution, as stated in Ex. 22:3.

The punishment of absolute exile was not prescribed by the Law: because God was worshipped by that people alone, whereas all other nations were given to idolatry: wherefore if any man were exiled from that people absolutely, he would be in danger of falling into idolatry. For this reason it is related (1 Kings 26:19) that David said to Saul: "They are cursed in the sight of the Lord, who have cast me out this day, that I should not dwell in the inheritance of the Lord, saying: Go, serve strange gods." There was, however, a restricted sort of exile: for it is written in Deut. 19:4 [Cf. Num. 35:25] that "he that striketh [Vulg.: 'killeth'] his neighbor ignorantly, and is proved to have had no hatred against him, shall flee to one of the cities" of refuge and "abide there until the death of the high-priest." For then it became lawful for him to return home, because when the whole people thus suffered a loss they forgot their private quarrels, so that the next of kin of the slain were not so eager to kill the slayer.

Dumb animals were ordered to be slain, not on account of any fault of theirs; but as a punishment to their owners, who had not safeguarded their beasts from these offenses. Hence the owner was more severely punished if his ox had butted anyone "yesterday or the day before" (in which case steps might have been taken to avoid the danger) than if it had taken to butting suddenly.—Or again, the animal was slain in detestation of the sin; and lest men should be horrified at the sight thereof.

The literal reason for this commandment, as Rabbi Moses declares (Doct. Perplex. iii), was because the slayer was frequently from the nearest city: wherefore the slaying of the calf was a means of investigating the hidden murder. This was brought about in three ways. In the first place the elders of the city swore that they had taken every measure for safeguarding the roads. Secondly, the owner of the heifer was indemnified for the slaying of his beast, and if the murder was previously discovered, the beast was not slain. Thirdly, the place, where the heifer was slain, remained uncultivated. Wherefore, in order to avoid this twofold loss, the men of the city would readily make known the murderer, if they knew who he was: and it would seldom happen but that some word or sign would escape about the matter. Or again, this was done in order to frighten people, in detestation of murder. Because the slaying of a heifer, which is a useful animal and full of strength, especially before it has been put under the yoke, signified that whoever committed murder, however useful and strong he might be, was to forfeit his life; and that, by a cruel death, which was implied by the striking off of its head; and that the murderer, as vile and abject, was to be cut off from the fellowship of men, which was betokened by the fact that the heifer after being slain was left to rot in a rough and uncultivated place.

Mystically, the heifer taken from the herd signifies the flesh of Christ; which had not drawn a yoke, since it had done no sin; nor did it plough the ground, i.e. it never knew the stain of revolt. The fact of the heifer being killed in an uncultivated valley signified the despised death of Christ, whereby all sins are washed away, and the devil is shown to be the arch-murderer.

The Law excluded the men of no nation from the worship of God and from things pertaining to the welfare of the soul: for it is written (Ex. 12:48): "If any stranger be willing to dwell among you, and to keep the Phase of the Lord; all his males shall first be circumcised, and then shall he celebrate it according to the manner, and he shall be as that which is born in the land." But in temporal matters concerning the public life of the people, admission was not granted to everyone at once, for the reason given above: but to some, i.e. the Egyptians and Idumeans, in the third generation; while others were excluded in perpetuity, in detestation of their past offense, i.e. the peoples of Moab, Ammon, and Amalec. For just as one man is punished for a sin committed by him, in order that others seeing this may be deterred and refrain from sinning; so too may one nation or city be punished for a crime, that others may refrain from similar crimes.

Nevertheless it was possible by dispensation for a man to be admitted to citizenship on account of some act of virtue: thus it is related (Judith 14:6) that Achior, the captain of the children of Ammon, "was joined to the people of Israel, with all the succession of his kindred." The same applies to Ruth the Moabite who was "a virtuous woman" (Ruth 3:11): although it may be said that this prohibition regarded men and not women, who are not competent to be citizens absolutely speaking.

As the Philosopher says (Polit. iii, 3), a man is said to be a citizen in two ways: first, simply; secondly, in a restricted sense. A man is a citizen simply if he has all the rights of citizenship, for instance, the right of debating or voting in the popular assembly. On the other hand, any man may be called citizen, only in a restricted sense, if he dwells within the state, even common people or children or old men, who are not fit to enjoy power in matters pertaining to the common weal. For this reason bastards, by reason of their base origin, were excluded from the ecclesia, i.e. from the popular assembly, down to the tenth generation. The same applies to eunuchs, who were not competent to receive the honor due to a father, especially among the Jews, where the divine worship was continued through carnal generation: for even among the heathens, those who had many children were marked with special honor, as the Philosopher remarks (Polit. ii, 6). Nevertheless, in matters pertaining to the grace of God, eunuchs were not discriminated from others, as neither were strangers, as already stated: for it is written (Isa. 56:3): "Let not the son of the stranger that adhereth to the Lord speak, saying: The Lord will divide and separate me from His people. And let not the eunuch say: Behold I am a dry tree."

It was not the intention of the Law to sanction the acceptance of usury from strangers, but only to tolerate it on account of the proneness of the Jews to avarice; and in order to promote an amicable feeling towards those out of whom they made a profit.

A distinction was observed with regard to hostile cities. For some of them were far distant, and were not among those which had been promised to them. When they had taken these cities, they killed all the men who had fought against God's people; whereas the women and children were spared. But in the neighboring cities which had been promised to them, all were ordered to be slain, on account of their former crimes, to punish which God sent the Israelites as executor of Divine justice: for it is written (Deut. 9:5) "because they have done wickedly, they are destroyed at thy coming in." The fruit-trees were commanded to be left untouched, for the use of the people themselves, to whom the city with its territory was destined to be subjected.

The builder of a new house, the planter of a vineyard, the newly married husband, were excluded from fighting, for two reasons. First, because man is wont to give all his affection to those things which he has lately acquired, or is on the point of having, and consequently he is apt to dread the loss of these above other things. Wherefore it was likely enough that on account of this affection they would fear death all the more, and be so much the less brave in battle. Secondly, because, as the Philosopher says (Phys. ii, 5), "it is a misfortune for a man if he is prevented from obtaining something good when it is within his grasp." And so lest the surviving relations should be the more grieved at the death of these men who had not entered into the possession of the good things prepared for them; and also lest the people should be horror-stricken at the sight of their misfortune: these men were taken away from the danger of death by being removed from the battle.

The timid were sent back home, not that they might be the gainers thereby; but lest the people might be the losers by their presence, since their timidity and flight might cause others to be afraid and run away.

As the children of Israel had been delivered by the Lord from slavery, and for this reason were bound to the service of God, He did not wish them to be slaves in perpetuity. Hence it is written (Lev. 25:39, seqq.): "If thy brother, constrained by poverty, sell himself to thee, thou shalt not oppress him with the service of bondservants: but he shall be as a hireling and a sojourner . . . for they are My servants, and I brought them out of the land of Egypt: let them not be sold as bondmen": and consequently, since they were slaves, not absolutely but in a restricted sense, after a lapse of time they were set free.

This commandment is to be understood as referring to a servant whom his master seeks to kill, or to help him in committing some sin.

With regard to the ill-treatment of servants, the Law seems to have taken into consideration whether it was certain or not: since if it were certain, the Law fixed a penalty: for maiming, the penalty was forfeiture of the servant, who was ordered to be given his liberty: while for slaying, the punishment was that of a murderer, when the slave died under the blow of his master. If, however, the hurt was not certain, but only probable, the Law did not impose any penalty as regards a man's own servant: for instance if the servant did not die at once after being struck, but after some days: for it would be uncertain whether he died as a result of the blows he received. For when a man struck a free man, yet so that he did not die at once, but "walked abroad again upon his staff," he that struck him was quit of murder, even though afterwards he died. Nevertheless he was bound to pay the doctor's fees incurred by the victim of his assault. But this was not the case if a man killed his own servant: because whatever the servant had, even his very person, was the property of his master. Hence the reason for his not being subject to a pecuniary penalty is set down as being "because it is his money."

As stated above (ad 1), no Jew could own a Jew as a slave absolutely: but only in a restricted sense, as a hireling for a fixed time. And in this way the Law permitted that through stress of poverty a man might sell his son or daughter. This is shown by the very words of the Law, where we read: "If any man sell his daughter to be a servant, she shall not go out as bondwomen are wont to go out." Moreover, in this way a man might sell not only his son, but even himself, rather as a hireling than as a slave, according to Lev. 25:39, 40: "If thy brother, constrained by poverty, sell himself to thee, thou shalt not oppress him with the service of bondservants: but he shall be as a hireling and a sojourner."

As the Philosopher says (Ethic. x, 9), the paternal authority has the power only of admonition; but not that of coercion, whereby rebellious and headstrong persons can be compelled. Hence in this case the Lord commanded the stubborn son to be punished by the rulers of the city.

The Lord forbade them to marry strange women on account of the danger of seduction, lest they should be led astray into idolatry. And specially did this prohibition apply with respect to those nations who dwelt near them, because it was more probable that they would adopt their religious practices. When, however, the woman was willing to renounce idolatry, and become an adherent of the Law, it was lawful to take her in marriage: as was the case with Ruth whom Booz married. Wherefore she said to her mother-in-law (Ruth 1:16): "Thy people shall be my people, and thy God my God." Accordingly it was not permitted to marry a captive woman unless she first shaved her hair, and pared her nails, and put off the raiment wherein she was taken, and mourned for her father and mother, in token that she renounced idolatry for ever.

As Chrysostom says (Hom. xlviii super Matth.), "because death was an unmitigated evil for the Jews, who did everything with a view to the present life, it was ordained that children should be born to the dead man through his brother: thus affording a certain mitigation to his death. It was not, however, ordained that any other than his brother or one next of kin should marry the wife of the deceased, because" the offspring of this union "would not be looked upon as that of the deceased: and moreover, a stranger would not be under the obligation to support the household of the deceased, as his brother would be bound to do from motives of justice on account of his relationship." Hence it is evident that in marrying the wife of his dead brother, he took his dead brother's place.

The Law permitted a wife to be divorced, not as though it were just absolutely speaking, but on account of the Jews' hardness of heart, as Our Lord declared (Matt. 19:8). Of this, however, we must speak more fully in the treatise on Matrimony (Supp., Q. 67).

Wives break their conjugal faith by adultery, both easily, for motives of pleasure, and hiddenly, since "the eye of the adulterer observeth darkness" (Job 24:15). But this does not apply to a son in respect of his father, or to a servant in respect of his master: because the latter infidelity is not the result of the lust of pleasure, but rather of malice: nor can it remain hidden like the infidelity of an adulterous woman.