Redemptoris Mater §25

²⁵ "The Church 'like a pilgrim in a foreign land, presses forward amid the persecutions of the world and the consolations of God,' announcing the Cross and Death of the Lord until he comes (cf. 1 Cor. 11:26)." "Israel according to the flesh, which wandered as an exile in the desert, was already called the Church of God (cf. 2 Esd. 13:1; Num. 20:4; Dt. 23:1ff.). Likewise the new Israel...is also called the Church of Christ (cf Mt 16:18). For he has bought it for himself with his blood (Acts 20:28), has filled it with his Spirit, and provided it with those means which befit it as a visible and social unity. God has gathered together as one all those who in faith look upon Jesus as the author of salvation and the source of unity and peace, and has established them as Church, that for each and all she may be the visible sacrament of this saving unity." The Second Vatican Council speaks of the pilgrim Church, establishing an analogy with the Israel of the Old Covenant journeying through the desert. The journey also has an external character, visible in the time and space in which it historically takes place. For the Church "is destined to extend to all regions of the earth and so to enter into the history of mankind," but at the same time "she transcends all limits of time and of space." And yet the essential character of her pilgrimage is interior: it is a question of a pilgrimage through faith, by "the power of the Risen Lord," a pilgrimage in the Holy Spirit, given to the Church as the invisible Comforter (parakletos) (cf. Jn. 14:26; 15:26; 16:7): "Moving forward through trial and tribulation, the Church is strengthened by the power of God's grace promised to her by the Lord, so that...moved by the Holy Spirit, she may never cease to renew herself, until through the Cross she arrives at the light which knows no setting." It is precisely in this ecclesial journey or pilgrimage through space and time, and even more through the history of souls, that Mary is present, as the one who is "blessed because she believed," as the one who advanced on the pilgrimage of faith, sharing unlike any other creature in the mystery of Christ. The Council further says that "Mary figured profoundly in the history of salvation and in a certain way unites and mirrors within herself the central truths of the faith." Among all believers she is like a "mirror" in which are reflected in the most profound and limpid way "the mighty works of God" (Acts 2:11).