31 The greatest glory of virgins is undoubtedly to be the living images of the perfect integrity of the union between the Church and her divine Spouse. For this society founded by Christ it is a profound joy that virgins should be the marvelous sign of its sanctity and fecundity, as St. Cyprian so well expressed it: "They are the flower of the Church, the beauty and ornament of spiritual grace, a subject of joy, a perfect and unsullied homage of praise and honor, the image of God corresponding to the sanctity of the Lord, the most illustrious portion of Christ's flock. In them the glorious fecundity of our mother, the Church, finds expression and she rejoices; the more the number of virgins increases, the greater is this mother's joy."
Source: Sacra Virginitas (Vatican.va)