21 The old law had a different ideal of blessedness, for therein it is said: “Blessed is he who has seed in Zion and a family in Jerusalem:” and “Cursed is the barren who bears not:” and “Your children shall be like olive-plants round about your table.” Riches too are promised to the faithful and we are told that “there was not one feeble person among their tribes.” But now even to eunuchs it is said, “Say not, behold I am a dry tree,” for instead of sons and daughters you have a place forever in heaven.
Now the poor are blessed, now Lazarus is set before Dives in his purple. Now he who is weak is counted strong. But in those days the world was still unpeopled: accordingly, to pass over instances of childlessness meant only to serve as types, those only were considered happy who could boast of children. It was for this reason that Abraham in his old age married Keturah; that Leah hired Jacob with her son's mandrakes, and that fair Rachel— a type of the church— complained of the closing of her womb. But gradually the crop grew up and then the reaper was sent forth with his sickle.
Elijah lived a virgin life, so also did Elisha and many of the sons of the prophets. To Jeremiah the command came: “You shall not take you a wife.” He had been sanctified in his mother's womb, and now he was forbidden to take a wife because the captivity was near. The apostle gives the same counsel in different words. “I think, therefore, that this is good by reason of the present distress, namely that it is good for a man to be as he is.” What is this distress which does away with the joys of wedlock?
The apostle tells us, in a later verse: “The time is short: it remains that those who have wives be as though they had none.” Nebuchadnezzar is hard at hand. The lion is bestirring himself from his lair. What good will marriage be to me if it is to end in slavery to the haughtiest of kings? What good will little ones be to me if their lot is to be that which the prophet sadly describes: “The tongue of the sucking child cleaves to the roof of his mouth for thirst; the young children ask for bread and no man breaks it unto them”? In those days, as I have said, the virtue of continence was found only in men: Eve still continued to travail with children.
But now that a virgin has conceived in the womb and has borne to us a child of which the prophet says that “Government shall be upon his shoulder, and his name shall be called the mighty God, the everlasting Father,” now the chain of the curse is broken. Death came through Eve, but life has come through Mary. And thus the gift of virginity has been bestowed most richly upon women, seeing that it has had its beginning from a woman. As soon as the Son of God set foot upon the earth, He formed for Himself a new household there; that, as He was adored by angels in heaven, angels might serve Him also on earth.
Then chaste Judith once more cut off the head of Holofernes. Then Haman— whose name means iniquity— was once more burned in fire of his own kindling. Then James and John forsook father and net and ship and followed the Saviour: neither kinship nor the world's ties, nor the care of their home could hold them back. Then were the words heard: “Whosoever will come after me, let him deny himself and take up his cross and follow me.” For no soldier goes with a wife to battle. Even when a disciple would have buried his father, the Lord forbade him, and said: “Foxes have holes and the birds of the air have nests, but the Son of Man has not where to lay His head.” So you must not complain if you have but scanty house-room.
In the same strain, the apostle writes: “He that is unmarried cares for the things that belong to the Lord, how he may please the Lord: but he that is married cares for the things that are of the world how he may please his wife. There is difference also between a wife and a virgin. The unmarried woman cares for the things of the Lord that she may be holy both in body and in spirit. But she that is married cares for the things of the world how she may please her husband.”
Source: Letters (New Advent)