Among [the Jewish] people then, because it was necessary that there should be an abundant increase until Christ came, by the multiplication of that people in whom were to be prefigured all that was to be prefigured as instruction for the Church, it was a duty to marry wives, by means of whom that people in whom the Church should be foreshown might increase. But when the King of all nations Himself was born, then began the honor of virginity with the Mother of the Lord, who had the privilege of bearing a Son without any loss of her virgin purity. Since it was a true marriage, and a marriage free from all corruption, why should not the husband chastely receive what his wife had chastely brought forth? For as she was a wife in chastity, so was he in chastity a husband; and as she was in chastity a mother, so was he in chastity a father. Whoever then says that he ought not to be called father, because he did not beget his Son in the usual way, looks rather to the satisfaction of passion in the procreation of children, and not the natural feeling of affection. What others desire to fulfill in the flesh, he in a more excellent way fulfilled in the spirit. For thus they who adopt children, beget them by the heart in greater chastity, whom they cannot by the flesh beget. Consider, brethren, the laws of adoption; how a man comes to be the son of another, of whom he was not born, so that the choice of the person who adopts has more right in him than the nature of him who begets him has. Not only then must Joseph be a father, but in a most excellent manner a father...
