The Banquet of Virgins, Discourse II - Theophila, Chapter I.
Then Theopila spoke:-
"Since Marcella has excellently begun this discussion without sufficiently completing it, it is necessary that I should endeavour to put a finish to it. Now, the fact that man has advanced by degrees to virginity, God urging him on from time to time, seems to me to have been admirably proved; but I cannot say the same as to the assertion that from henceforth they should no longer beget children. For I think I have perceived clearly from the Scriptures that, after He had brought in virginity, the Word did not altogether abolish the generation of children; for although the moon may be greater than the stars, the light of the other stars is not destroyed by the moonlight."
Let us begin with Genesis, that we may give its place of antiquity and supremacy to this scripture. Now the sentence and ordinance of God respecting the begetting of children (Gen i. 28) is confessedly being fulfilled to this day, the Creator still fashioning man. For this is quite manifest, that God, like a painter, is at this very time working at the world, as the Lord also taught, “My Father worketh hitherto.” (even until now. John v. 17) But when the rivers shall cease to flow and fall into the reservoir of the sea, and the light shall be perfectly separated from the darkness,—for the separation is still going on,—and the dry land shall henceforth cease to bring forth its fruits with creeping things and four-footed beasts, and the predestined number of men shall be fulfilled; then from henceforth shall men abstain from the generation of children. But at present man must cooperate in the forming of the image of God, while the world exists and is still being formed; for it is said, “Increase and multiply.” (Gen i. 28) And we must not be offended at the ordinance of the Creator, from which, moreover, we ourselves have our being. For the casting of seed into the furrows of the matrix is the beginning of the generation of men, so that bone taken from bone, and flesh from flesh, by an invisible power, are fashioned into another man. And in this way we must consider that the saying is fulfilled, “This is now bone of my bone, and flesh of my flesh.” (Gen ii. 23)