The Symposium (Banquet of the Ten Virgins)

Now if any one should have a doubt about these things, inasmuch as the points are nowhere fully wrought out, and should still wish more fully to perceive their spiritual significance, namely, what the queens and the concubines and the virgins are, we will say that these may have been spoken concerning those who have been conspicuous for their righteousness from the beginning throughout the progress of time; as of those before the flood, and those after the flood, and so on of those after Christ. The Church, then, is the spouse. The queens are those royal souls before the deluge, who became well-pleasing to God, that is, those about Abel and Seth and Enoch. The concubines those after the flood, namely, those of the prophets, in whom, before the Church was betrothed to the Lord, being united to them after the manner of concubines, He sowed true words in an incorrupt and pure philosophy, so that, conceiving faith, they might bring forth to Him the Spirit of salvation. For such fruits do the souls bring forth with whom Christ has had intercourse, fruits which bear an ever-memorable renown. For if you will look at the books of Moses, or David, or Solomon, or Isaiah, or of the prophets who follow, O virgins, you will see what offspring they have left, for the saving of life, from their intercourse with the Son of God. Hence the Word has with deep perception called the souls of the prophets concubines, because He did not espouse them openly, as He did the Church, having killed for her the fatted calf.