Lumen fidei EN 57
58 In the parable of the sower, Saint Luke has left us these words of the Lord about the "good soil": "These are the ones who when they hear the word, hold it fast in an honest and good heart, and bear fruit with patient endurance" (Lc 8,15). In the context of Lukeís Gospel, this mention of an honest and good heart which hears and keeps the word is an implicit portrayal of the faith of the Virgin Mary. The evangelist himself speaks of Maryís memory, how she treasured in her heart all that she had heard and seen, so that the word could bear fruit in her life. The Mother of the Lord is the perfect icon of faith; as Saint Elizabeth would say: "Blessed is she who believed" (Lc 1,45).
In Mary, the Daughter of Zion, is fulfilled the long history of faith of the Old Testament, with its account of so many faithful women, beginning with Sarah: women who, alongside the patriarchs, were those in whom Godís promise was fulfilled and new life flowered. In the fullness of time, Godís word was spoken to Mary and she received that word into her heart, her entire being, so that in her womb it could take flesh and be born as light for humanity. Saint Justin Martyr, in his dialogue with Trypho, uses a striking expression; he tells us that Mary, receiving the message of the angel, conceived "faith and joy". In the Mother of Jesus, faith demonstrated its fruitfulness; when our own spiritual lives bear fruit we become filled with joy, which is the clearest sign of faithís grandeur. In her own life Mary completed the pilgrimage of faith, following in the footsteps of her Son. In her the faith journey of the Old Testament was thus taken up into the following of Christ, transformed by him and entering into the gaze of the incarnate Son of God.
 Cf. Dialogus cum Tryphone Iudaeo, 100, 5: PG 6, 710.
 Cf. Second Vatican Ecumenical Council, Dogmatic Constitution on the Church Lumen Gentium, LG 58.
59 We can say that in the Blessed Virgin Mary we find something I mentioned earlier, namely that the believer is completely taken up into his or her confession of faith. Because of her close bond with Jesus, Mary is strictly connected to what we believe. As Virgin and Mother, Mary offers us a clear sign of Christís divine sonship. The eternal origin of Christ is in the Father. He is the Son in a total and unique sense, and so he is born in time without the intervention of a man. As the Son, Jesus brings to the world a new beginning and a new light, the fullness of Godís faithful love bestowed on humanity. But Maryís true motherhood also ensured for the Son of God an authentic human history, true flesh in which he would die on the cross and rise from the dead. Mary would accompany Jesus to the cross (cf. Jn 19,25), whence her motherhood would extend to each of his disciples (cf. Jn 19,26-27). She will also be present in the upper room after Jesusí resurrection and ascension, joining the apostles in imploring the gift of the Spirit (cf. Ac 1,14). The movement of love between Father, Son and Spirit runs through our history, and Christ draws us to himself in order to save us (cf. Jn 12,32). At the centre of our faith is the confession of Jesus, the Son of God, born of a woman, who brings us, through the gift of the Holy Spirit, to adoption as sons and daughters (cf. Ga 4,4).
60 Let us turn in prayer to Mary, Mother of the Church and Mother of our faith.
Mother, help our faith!
Open our ears to hear Godís word and to recognize his voice and call.
Awaken in us a desire to follow in his footsteps, to go forth from our own land and to receive his promise.
Help us to be touched by his love, that we may touch him in faith.
Help us to entrust ourselves fully to him and to believe in his love, especially at times of trial, beneath the shadow of the cross, when our faith is called to mature.
Sow in our faith the joy of the Risen One.
Remind us that those who believe are never alone.
Teach us to see all things with the eyes of Jesus, that he may be light for our path. And may this light of faith always increase in us, until the dawn of that undying day which is Christ himself, your Son, our Lord!
Given in Rome, at Saint Peterís, on 29 June, the Solemnity of the Holy Apostles Peter and Paul, in the year 2013, the first of my pontificate.
Lumen fidei EN 57