5 What the true effect of baptism is, and what is the real grace conveyed by water hallowed in Christ, I will presently tell you; meantime I will deal with this argument as it deserves. 'An ill knot,' says the common proverb, 'requires but an ill wedge to split it.' The text quoted by the objector, “a bishop must be the husband of one wife,” admits of quite another explanation. The apostle came of the Jews and the primitive Christian church was gathered out of the remnants of Israel. Paul knew that the Law allowed men to have children by several wives, and was aware that the example of the patriarchs had made polygamy familiar to the people. Even the very priests might at their own discretion enjoy the same license. He gave commandment therefore that the priests of the church should not claim this liberty, that they should not take two wives or three together, but that they should each have but one wife at one time. Perhaps you may say that this explanation which I have given is disputed; in that case listen to another. You must not have a monopoly of bending the Law to suit your will instead of bending your will to suit the Law. Some by a strained interpretation say that wives are in this passage to be taken for churches and husbands for their bishops. A decree was made by the fathers assembled at the council of Nicæa that no bishop should be translated from one church to another, lest scorning the society of a poor yet virgin see he should seek the embraces of a wealthy and adulterous one. For as the word λογισμόι, that is, “disputings,” refers to the fault and misdoing of sons in the faith, and as the precept concerning the management of a house refers to the right direction of body and of soul, so by the wives of the bishops we are to understand their churches. Concerning whom it is written in Isaiah, “Make haste ye women and come from the show, for it is a people of no understanding.” And again “Rise up, you women that are wealthy, and hear my voice.” And in the Book of Proverbs, “Who can find a virtuous woman? For her price is far above rubies. The heart of her husband does safely trust in her.” In the same book too it is written, “Every wise woman builds her house: but the foolish plucks it down with her hands.” Nor does this, say they, derogate from the dignity of the episcopate; for the same figure is used in relation to God. Jeremiah writes: “As a wife treacherously departs from her husband, so have ye dealt treacherously with me, O house of Israel.” And the apostle employs the same comparison: “I have espoused you,” he says to his converts, “to one husband, that I may present you as a chaste virgin to Christ.” The word woman is in the Greek ambiguous and should in all these places be understood as meaning wife. You will say that this interpretation is harsh and does violence to the sense. In that case give back to the scripture its simple meaning and save me from the necessity of fighting you on your own ground. I will ask you the following question, Can a man who before his baptism has kept a concubine, and after her death has received baptism and has taken a wife, become a clergyman or not? You will answer me that he can, because his first partner was a concubine and not a wife. What the apostle condemns then, it would seem, is not mere sexual intercourse but marriage contracts and conjugal rights. Many persons, we see, because of narrow circumstances refuse to take upon them the burden of matrimony. Instead of taking wives they live with their maid-servants and bring up as their own the children which these bear to them. Thus, if through the bounty of the Emperor they gain for their mistresses the right of wearing a matron's robes, they will at once come beneath the yoke of the apostle and sorely against their will will have to receive their partners as their wedded wives. But, if their poverty prevents them from obtaining an imperial rescript such as I have mentioned, the decrees of the Church will vary with the laws of Rome. Be careful therefore not to interpret the words “the husband of one wife,” that is, of one woman, as approving indiscriminate intercourse and condemning only contracts of marriage.
I bring forward all these explanations not for the purpose of resisting the true and simple sense of the words in question but to show you that you must take the holy scriptures as they are written, and that you must not empty of its efficacy the baptismal rite ordained by the Saviour, or render vain the whole mystery of the cross.
Source: Letters (New Advent)