“To identify the source of the infancy narrative one must go back to St. Luke’s remark: ‘Mary kept all these things, pondering them in her heart’… Mary ‘who kept these things in her heart’… could bear witness, after Christ’s death and resurrection, in regard to what concerned herself and her role as Mother, precisely in the apostolic period when the New Testament texts were being written, and when the early Christian tradition had its origin.” (General Audience, January 28, 1988)
"As the infancy Gospels enable us to grasp, the first Christian communities themselves gathered together Mary’s recollections about the mysterious circumstances of the Savior’s conception and birth. In particular, the Annunciation account responds to the disciples’ desire to have the deepest knowledge of the events connected with the beginnings of the risen Christ’s earthly life. In the last analysis, Mary is at the origin of the revelation about the mystery of the virginal conception by the work of the Holy Spirit.
This truth, showing Jesus’ divine origin, was immediately grasped by the first Christians for its important significance and included among the key affirmations of their faith." (General Audience, 13 September 1995)