Augustine of Hippo, on 2Cor 11:2

Do you wish to know how the church is a virgin? Hear the apostle Paul; hear the friend of the Bridegroom who is zealous not for himself but for the Bridegroom: "I betrothed you to one spouse." He spoke to the church. To which church? To all that his letter could reach. "I betrothed you to one spouse, that I might present you a chaste virgin to Christ. But I fear lest," he said, "as the serpent seduced Eve by his guile …" That serpent never physically defiled Eve, did he? Yet he did destroy her virginity of heart. On that account Paul said: "I fear lest … your minds may be corrupted from that chastity which is in Christ." Therefore, the church is a virgin; she is a virgin, may she be a virgin. Let her beware of the deceiver, lest he turn out to be a corrupter. The church is a virgin. Are you, perhaps, going to say to me: "If the church is a virgin, how does she bring forth children? Or, if she does not bring forth children, how did we give our names so that we might be born of her?" I answer: "She is a virgin and she also brings forth children." She imitates Mary, who gave birth to the Lord. Did not the holy Mary bring forth her Child and remain a virgin? So, too, the church both brings forth children and is a virgin. And if you would give some consideration to the matter, she brings forth Christ, because they who are baptized are his members.