Catechism of the Catholic Church
972 After speaking of the Church, her origin, mission, and destiny, we can find no better way to conclude than by looking to Mary. In her we contemplate what the Church already is in her mystery on her own "pilgrimage of faith," and what she will be in the homeland at the end of her journey. There, "in the glory of the Most Holy and Undivided Trinity," "in the communion of all the saints," 518 the Church is awaited by the one she venerates as Mother of her Lord and as her own mother.
In the meantime the Mother of Jesus, in the glory which she possesses in body and soul in heaven, is the image and beginning of the Church as it is to be perfected in the world to come. Likewise she shines forth on earth until the day of the Lord shall come, a sign of certain hope and comfort to the pilgrim People of God. 519
973 By pronouncing her "fiat" at the Annunciation and giving her consent to the Incarnation, Mary was al ready collaborating with the whole work her Son was to accomplish. She is mother wherever he is Savior and head of the Mystical Body.
974 The Most Blessed Virgin Mary, when the course of her earthly life was completed, was taken up body and soul into the glory of heaven, where she already shares in the glory of her Son's Resurrection, anticipating the resurrection of all members of his Body.
975 "We believe that the Holy Mother of God, the new Eve, Mother of the Church, continues in heaven to exercise her maternal role on behalf of the members of Christ" (Paul VI, CPG § 15).
English Translation of the Cathechism of the Catholic Church for the United States of America © 1997, United States Catholic Conference, Inc.