Thus far Paul has spoken professedly on the authority of "the Lord." Next he contemplates the case of an existing union between a Christian and an unbeliever; and on his own judgment he admits a new ground of separation. "But to the rest speak I, not the Lord." The Christian may not put away or abandon his spouse on account of difference in religious faith. "For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy. But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases."[35] Again, through this last remark, the seeds of dissension are planted; for it is not clear whether the "bondage" from which the brother or sister is freed is that of the existing marriage or the irksome necessity of perpetual single life after separation.

Upon these Bible passages, often vague and puzzling in the extreme,[36] was eventually erected the whole doctrine of the mediæval church relating to divorce. It is not surprising that harmony was reached only after many centuries of struggle. With the exact processes of argument by which ingenious theologians have in all ages sought to reconcile or interpret the scriptural teaching we are here but little concerned. At present we are mainly interested in the general results of thought as they find expression in the law and practice of the church previous to the Reformation. The subject presents four phases or aspects of development, each of which will be briefly considered: the views of the early Fathers; the legislation of the Christian emperors; the compromise with Germanic custom; and the final settlement of doctrine in the canon law.

b) Views of the early Fathers.—During the first four centuries of our era the so-called "strict" construction of the utterances of Jesus and Paul relating to the twofold question of separation and second marriage was formulated by the Fathers of the church; and the principles then agreed upon were in the end, after an intervening period of vacillation and compromise, to be accepted and elaborated into a complete system of law by the canonists. The literature of this early debate may be regarded as reaching from the Pastor of Hermas, a writer in the first half of the second century, highly respected in Christian antiquity,[37] to Augustine, late in the fourth century (died 430), who towers above all the other Fathers in his influence for good or evil in the history of European thought. At first the Pauline interdict of further marriage after separation receives more attention perhaps than the question of divorce itself, with its assigned cause as laid down by Jesus; for it is strongly urged that the chief evil of a too lax divorce system, such as the Roman, is the facility of second marriage regardless of the guilt or innocence of the parties.[38] Setting aside for the present the case of the Christian whose unbelieving spouse voluntarily departs—the casus apostoli or privilegium Paulinum, as it is later styled by the canonists[39]—nearly all are agreed that divorce is forbidden except for the one cause mentioned by Matthew. There is, however, a divergence of view in two important particulars. On the one hand, certain writers, such as Tertullian and pseudo-Ambrose, following the principle of the Jewish law, admit this ground of repudiation to the advantage of the man, but not to that of the woman; while others, like Epiphanius, maintain the equal right of the sexes in this regard. On the other hand, in a few instances the word "adultery"[40] is accepted in an allegorical or spiritual sense, thus greatly widening the field of divorce. In this way, for example, Hermas, Hieronymus, and, for a time, Augustine anticipate the mode of interpretation adopted by some of the Reformation Fathers, admitting idolatry, apostasy, and covetousness, equally with carnal transgression, as proper grounds of separation.[41]

The case is similar with respect to second marriage. Apparently there is a strong tendency from the beginning to treat marriage as indissoluble, but, "intentionally or unintentionally," the utterances of the Fathers on this vital question are unclear. Frequently they content themselves, as Geffcken observes, with a "paraphrase of the scriptural texts relating to the matter."[42] Seemingly, according to the common or prevailing opinion, neither party whether innocent or guilty is allowed to form a new marriage during the lifetime of the other; but there is on this point a great lack of precision.[43] Tertullian, after yielding to Montanism, even goes so far as to reject all second marriage as un-Christian; and the same position is taken by Minutius Felix.[44] There are, however, less rigid constructions. By some Fathers the right of remarriage is conceded to the man repudiating a guilty wife, while they deny it to the woman under like conditions. Others, actuated by a livelier sense of justice, like Epiphanius, concede it to both consorts alike; but these opinions are rejected by the majority.[45] More and more, in theory if not always in practice, the antagonism of the church to the second marriage of a divorced man or woman becomes apparent as we approach the close of the period under consideration. This is proved even by the action of the provincial assemblies. Thus the Spanish Council of Elvira of the year 306 decrees that the woman who puts away a guilty husband and marries another shall be excommunicated; and, save in case of mortal sickness, she shall not be admitted again to communion until after her first husband's death. If, however, she have left her husband without cause and contracted another marriage, she shall not be admitted to communion even on the death-bed; but nothing is said concerning a dissolution of the later marriage.[46] Similar in spirit are the canons of the Council of Arles held in the year 314. The general principle of the indissolubility of the matrimonial relation is positively asserted,[47] but in connection with a concession which illustrates the practical difficulty of consistently enforcing the new doctrine in all parts of the Roman world. The youthful husband[48] who puts away a guilty wife is to be "advised" not to marry again during her lifetime; thus dealing far more gently with the man than did the Council of Elvira with the woman for the same offense.[49]

Finally, with Augustine, the strict doctrine of the early church takes a definite form, to which the masters of later times look back as to an authoritative canon of interpretation. He gave to the theory of indissolubility, declares Esmein, a "basis solid, in a measure scientific. He gave it a consistency forced from the sacrament of marriage. He set aside at one stroke all the causes of divorce admitted by the secular law: sickness, captivity, or prolonged absence. He was, one may say, the artisan who gave the final touch to the theory of indissolubility."[50] According to Augustine, adultery is the only scriptural ground of separation; but even this does not dissolve the nuptial bond. Moreover, those who, following the letter of Matthew's text, would for this offense allow the man, but not the woman, the right of repudiation, he "justly reproaches with violating one of the great principles of Christian law—the equality of the wedded pair."[51] Similar views are held by Hieronymus, Ambrose, Jerome, Chrysostom, and other contemporaries of Augustine;[52] and it is probably due to his influence mainly that in 407 the strict theory of indissolubility was proclaimed by the Council of Carthage;[53] as already in 405 it had been accepted in a decree of Pope Innocent I. addressed to the bishop of Toulouse.[54]

In practical life the strict theory of the Fathers came very far short of realization. Hermas, who strongly favors the rigid view, allows the man to marry again whose wife sins a second time after once being reconciled.[55] Basil goes farther, declaring that the husband abandoned by his wife is worthy of pardon, and that the woman who then marries him is not condemned.[56] Even Jerome excuses Fabiola, a young Christian woman of high position who had repudiated a licentious husband and contracted a new marriage, saying, "if she is blamed because when her husband was divorced she did not remain unmarried, I will readily admit her fault, while I admit her necessity."[57] Origen shows that some rulers of the church in such a case permit a woman to marry again while the first husband is living;[58] and Augustine confesses that the women who abstain from remarriage after divorce are extremely few.[59]

c) The legislation of the Christian emperors.—Where the most severe teachers of the early church, and even the ecclesiastical councils themselves, as we have seen, were thus led to temporize, it is not surprising that an enlightened secular policy should be compelled to take intermediate ground. The legislation of the first Christian emperors goes far beyond the narrow limits which Tertullian, Clement, or Augustine would have drawn. For centuries, through every change in the statutes, the Roman principles of one-sided divorce and divorce by mutual consent were maintained, though it was precisely these principles against which primitive Christianity took its firmest stand. "It was a maxim of Roman law far down beyond the time when the emperors became Christian, that no obstacle ought to be put in the way of a dissolution of marriage caused by the free consent of the partners, liberty of marrying again being in this case equally unrestricted. The lawyer Paulus says, that it has been thought improper that marriages, whether already contracted or about to take place, should be secured by the force of penalty (poenae vinculo obstringi), that is that two parties ought not to be forced by fear of penalty either to enter into a state of wedlock to which they were pledged, or to keep up such a state if they were agreed to the contrary. And it was laid down that marriage was so free, according to ancient opinion, that even agreements between the parties not to separate from one another could have no validity (pacta ne liceret divertere non valere)."[60] One-sided divorce was equally free, except in the cases and under the conditions fixed by Augustus,[61] "saving that here, if the woman had caused the divorce by her conduct, a large share of her dower was withheld from her, and if the man had caused it, he might be liable to pay over the whole of the dower, and that within a short term. The parties were subjected until the time of Justinian to a judicium morum, which might be instituted on a complaint of either consort. The fear, then, of losing a portion or the whole of the dower, and the dread of a loss of reputation, when the conduct of the parties in their married life should be investigated, seem to have been the only inducements to prevent one-sided divorces. But what if no misconduct could be alleged on the part of the man, what if he dismissed his wife to marry a richer woman, the law in this case had no restraining power. And where the wife brought no dower, as might happen in the lower classes, there could be no operation of the law at all."[62]

Accordingly, the legislation of the early Christian emperors shows no radical departure from the principles of the existing civil law. Divorce ex consensu was not prohibited until Justinian, who decreed that only when both partners are about to enter the cloister shall a separation by mutual agreement be permitted.[63] But this prohibition was short-lived; for in consequence of it the number of suits growing out of "poisoning or other attempts upon life among married people increased in so frightful a manner"[64] that the provision was abrogated by Justin II., the immediate successor of Justinian.[65] On the other hand, the efforts of Constantine and later rulers are directed mainly toward checking the evils of one-sided divorce. This is done chiefly through restricting the number of legal grounds of separation and sharpening the penalties for their disregard. Thus in 331 Constantine ordains that trifling causes (exquisitae causae) shall no longer suffice for a repudium justum or legal divorce at the will of one party. The woman may put away her husband only when he is a murderer, poisoner, or violator of sepulchers; and the man is allowed to repudiate his wife only when she is guilty of poisoning, procuring, or adultery. If the divorce takes place for any other reason, the woman so violating the statute shall forfeit all claim to restitution of dower and suffer transportation to an island; while the man in like case must at once surrender the entire dos, being prohibited also from contracting another marriage.[66] "Still further, if he thus married, his repudiated wife 'could invade his house,' as the law expresses it, and acquire possession of the entire dower of her successor."[67] It should be noted, however, that the Roman principle of divorce bona gratia, or one-sided separation for a legal cause not implying any guilt or offense, was still retained.[68]

In 363 Julian repealed the divorce law of Constantine;[69] but the principle of restricting the grounds of arbitrary repudiation was again adopted in 421 by Honorius and Constantius; though, like Julian, they allowed arbitrary separation for lesser faults, with retention of some portion of the dower.[70] Theodosius II., in 439, abrogating previous legislation, restored the law of the early empire; but "after ten years of experiment, in which divorces had alarmingly increased, gave out another law,[71] which laid down the causes for which one party might lawfully separate from the other. The woman was authorized to do this if the man had been guilty of certain crimes, among which are murder, poisoning, plotting against the government, fraud, and various sorts of robbery, cruelty toward or attempts on the life of his wife, intimacy with prostitutes, and adultery. The causes for which a man could without penalty put away his wife were for the most part of the same description with those just mentioned. But peculiar to her are the offenses of passing the night out of his house, or visiting the theatre, circus, or other public place against his will."[72] If the divorce occurs for any reason other than those mentioned in the statute, the penalty for either person is loss or surrender of the dower and the ante-nuptial gift; while in addition the woman, under penalty of "infamy," is prohibited from marrying again within five years.[73] This is a severe discrimination against the wife; but in one important matter, it will be noted, the law of Theodosius is strikingly impartial; for separation is permitted on account of adultery of the man as well as for that of the woman. In this regard the measure is far more liberal than the earlier Roman law, according to which adultery is not a crime which a husband can commit against his wife.[74] Moreover, while this offense is not always mentioned in the constitutions of the Christian emperors as legal ground for divorcing the husband, it is punished with extreme rigor. Sometimes both offenders are condemned to death. Sometimes a discrimination is made, the woman usually suffering the harsher penalty.[75]