14 And not without just cause a doubt is raised, whether he said this of all married women, or of such as so many are, as that nearly all may be thought so to be. For neither does that, which he says of unmarried women, “She, that is unmarried, thinkest of the things of the Lord, to be holy both in body and spirit:” pertain unto all unmarried women: whereas there are certain widows who are dead, who live in delights. However, so far as regards a certain distinction and, as it were, character of their own, of the unmarried and married; as she deserves the excess of hatred, who containing from marriage, that is, from a thing allowed, does not contain from offenses, either of luxury, or pride, or curiosity and prating; so the married woman is seldom met with, who, in the very obedience of married life, has no thought save how to please God, by adorning herself, not with plaited hair, or gold and pearls and costly attire, but as becomes women making profession of piety, through a good conversation.
Such marriages, forsooth, the Apostle Peter also describes by giving commandment. “In like manner,” says he, “wives obeying their own husbands; in order that, even if any obey not the word, they may be gained without discourse through the conversation of the wives, seeing your fear and chaste conversation: that they be not they that are adorned without with crispings of hair, or clothed with gold or with fair raiment; but that hidden man of your heart, in that unbroken continuance of a quiet and modest spirit, which before the Lord also is rich.
For thus certain holy women, who hoped in the Lord, used to adorn themselves, obeying their own husbands: as Sarah obeyed Abraham, calling him Lord: whose daughters you have become, when you do well, and fear not with any vain fear. Husbands in like manner living at peace and in chastity with your wives, both give ye honor as to the weaker and subject vessel, as with co-heirs of grace, and see that your prayers be not hindered.” Is it indeed that such marriages have no thought of the things of the Lord, how to please the Lord? But they are very rare: who denies this? And, being, as they are, rare, nearly all the persons who are such, were not joined together in order to be such, but being already joined together became such.
Source: On the Good of Marriage (New Advent)