15 The passages, however, which I have adduced in support of my position and in which it is permitted to widows, if they so desire, to marry again, are interpreted by some concerning those widows who had lost their husbands and were found in that condition when they became Christians. For, supposing a person baptized and her husband dead, it would not be consistent if the Apostle were to bid her marry another, when he enjoins even those who have wives to be as though they had them not.
And this is why the number of wives which a man may take is not defined, because when Christian baptism has been received, even though a third or a fourth wife has been taken, she is reckoned as the first. Otherwise, if, after baptism and after the death of a first husband, a second is taken why should not a sixth after the death of the second, third, fourth, and fifth, and so on? For it is possible, that through some strange misfortune, or by the judgement of God cutting short repeated marriages, a young woman may have several husbands, while an old woman may be left a widow by her first husband in extreme age.
The first Adam was married once: the second was unmarried. Let the supporters of second marriages show us as their leader a third Adam who was twice married. But granted that Paul allowed second marriages: upon the same grounds it follows that he allows even third and fourth marriages, or a woman may marry as often as her husband dies. The Apostle was forced to choose many things which he did not like. He circumcised Timothy, and shaved his own head, practised going barefoot, let his hair grow long, and cut it at Cenchrea.
And he had certainly chastised the Galatians, and blamed Peter because for the sake of Jewish observances he separated himself from the Gentiles. As then in other points connected with the discipline of the Church he was a Jew to Jews, a Gentile to Gentiles, and was made all things to all men, that he might gain all: so too he allowed second marriages to incontinent persons, and did not limit the number of marriages, in order that women, although they saw themselves permitted to take a second husband, in the same way as a third or a fourth was allowed, might blush to take a second, lest they should be compared to those who were three or four times married.
If more than one husband be allowed, it makes no difference whether he be a second or a third, because there is no longer a question of single marriage. “All things are lawful, but not all things are expedient.” I do not condemn second, nor third, nor, pardon the expression, eighth marriages: I will go still further and say that I welcome even a penitent whoremonger. Things that are equally lawful must be weighed in an even balance.
Source: Against Jovinianus (New Advent)