"The mutual relationship between the mystery of the Church and Mary appears clearly in the "great portent" described in the Book of Revelation: "A great portent appeared in heaven, a woman clothed with the sun, with the moon under her feet, and on her head a crown of twelve stars" (12:1). In this sign the Church recognizes an image of her own mystery: present in history, she knows that she transcends history, inasmuch as she constitutes on earth the "seed and beginning" of the Kingdom of God. 139 The Church sees this mystery fulfilled in complete and exemplary fashion in Mary. She is the woman of glory in whom God's plan could be carried out with supreme perfection. The "woman clothed with the sun"-the Book of Revelation tells us-"was with child" (12:2). The Church is fully aware that she bears within herself the Saviour of the world, Christ the Lord. She is aware that she is called to offer Christ to the world, giving men and women new birth into God's own life. But the Church cannot forget that her mission was made possible by the motherhood of Mary, who conceived and bore the One who is "God from God", "true God from true God". Mary is truly the Mother of God, the Theotokos, in whose motherhood the vocation to motherhood bestowed by God on every woman is raised to its highest level. Thus Mary becomes the model of the Church, called to be the "new Eve", the mother of believers, the mother of the "living" (cf. Gen 3:20)."