2 Strengthened by the presence of Christ (cf. Mt. 28:20), the Church journeys through time towards the consummation of the ages and goes to meet the Lord who comes. But on this journey- and I wish to make this point straightaway-she proceeds along the path already trodden by the Virgin Mary, who "advanced in her pilgrimage of faith, and loyally persevered in her union with her Son unto the cross." I take these very rich and evocative words from the Constitution Lumen Gentium, which in its concluding part offers a clear summary of the Church's doctrine on the Mother of Christ, whom she venerates as her beloved Mother and as her model in faith hope and charity. Shortly after the Council, my great predecessor Paul VI decided to speak further of the Blessed Virgin. In the Encyclical Epistle Christi Matri and subsequently in the Apostolic Exhortations Signum Magnum and Marialis Cultus he expounded the foundations and criteria of the special veneration which the Mother of Christ receives in the Church, as well as the various forms of Marian devotion- liturgical, popular and private-which respond to the spirit of faith.
Source: Redemptoris Mater (Vatican.va)