Galatians 4:27

"For it is written." And therefore, he says, Sarah was a type of the Jerusalem above, that is, of the Church, because she too being barren and without children, like the church once from the Gentiles, triumphed in offspring over Hagar; and the Church triumphed …

He is not undone, he says, but revolves as it were, and goes round himself. Moreover, also, cities in which we dwell, because we turn and go round in them, are denominated "Poleis." In this manner, he says, the Phrygians call this one "Aipolis," inasmuch as he everywhere ceaselessly turns all things, and changes them into their own peculiar (functions). And the Phrygians style him, he says, "very fruitful" likewise, "because," says he, "more numerous are the children of the desolate one, than those of her which hath an husband; " that is, things by being born again become immortal and abide for ever in great numbers, even though the things that are produced may be few; whereas things carnal, he says, are all corruptible, even though very many things (of this type) are produced. For this reason, he says, "Rachel wept for her children, and would not," says (the prophet), "be comforted; sorrowing for them, for she knew," says he, "that they are not." But Jeremiah likewise utters lamentation for Jerusalem below, not the city in Phoenicia, but the corruptible generation below. For Jeremiah likewise, he says, was aware of the Perfect Man, of him that is born again-of water and the Spirit not carnal. At least Jeremiah himself remarked: "He is a man, and who shall know him? " In this manner, (the Naassene) says, the knowledge of the Perfect Man is exceedingly profound, and difficult of comprehension. For, he says, the beginning of perfection is a knowledge of man, whereas knowledge of God is absolute perfection.

(Verse 27.) For it is written: rejoice, O you barren one, who does not bear; break forth and cry out, you who are not in labor; for the children of the desolate one will be more than those of the one who has a husband. (Isaiah 54:1.) The Synagogue had a husband, the Law; and according to the prophecy of Anna, she who was once barren in children was fertile. (1 Samuel 1.) But the Church, barren without Christ, without any conversation with the bridegroom, lay for a long time in the desert. But after she received the book of divorce into her hands, and turned all the ornaments of the husband into the idol's adornment: then the husband, with the previous belt decaying, wove another belt for his loins from the Gentiles: as soon as she was joined to the husband, she conceived and bore a child. And the Lord cries out through the prophet: 'If a nation is born at once' (Isaiah XLIX, 54): when in one day in the Acts of the Apostles three thousand, and five thousand men believed (Acts III, etc.) I do not think it necessary to speak about the multitude of Christians and the paucity of Jews, when the banners of the cross shine throughout the whole world, and a Jew appears scarce and remarkable in cities.

"Rejoice, you barren that bearest not; break forth and cry, you that travailest not; for she that is desolate has many more children than she that has an husband." In that He said, "Rejoice, you barren that bearest not," He referred to us, for our …

Who is this who before was "barren," and "desolate?" Clearly it is the Church of the Gentiles, that was before deprived of the knowledge of God? Who, "she which hath the husband?" plainly the Synagogue. Yet the barren woman surpassed her in the number of her children, for the other embraces one nation, but the children of the Church have filled the country of the Greeks and of the Barbarians, the earth and sea, the whole habitable world. Observe how Sarah by acts, and the Prophet by words, have described the events about to befal us. Observe too, that he whom Isaiah called barren, Paul hath proved to have many children, which also happened typically in the case of Sarah. For she too, although barren, became the mother of a numerous progeny. This however does not suffice Paul, but he carefully follows out the mode whereby the barren woman became a mother, that in this particular likewise the type might harmonize with the truth. ...