Moreover, that both young women [3897] and female servants are to be understood metaphorically, is not our doctrine merely, but one which we have received from the beginning from wise men, among whom a certain one said, when exhorting his hearers to investigate the figurative meaning: "Tell me, ye that read the law, do ye not hear the law? For it is written that Abraham had two sons; the one by a bond maid, the other by a free woman. But he who was of the bond woman was born after the flesh; but he of the free woman was by promise. Which things are an allegory: for these are the two covenants; the one from the Mount Sinai, which gendereth to bondage, which is Agar." [3898] And a little after, "But Jerusalem which is above is free, which is the mother of us all." And any one who will take up the Epistle to the Galatians may learn how the passages relating to the "marriages," and the intercourse with "the maid-servants," have been allegorized; the Scripture desiring us to imitate not the literal acts of those who did these things, but (as the apostles of Jesus are accustomed to call them) the spiritual.