Only if we open ourselves to God’s action, like Mary, will everything change

In the four Gospels, the answer is clear as to where Jesus “comes from”. His true origins are in the Father, God; he comes totally from him [God], but in a different way from that of any of God’s prophets or messengers who preceded him. This origin in the mystery of God, “whom no one knows” is already contained in the infancy narratives in the Gospels of Matthew and Luke that we are reading during this Christmastide. 

The Angel Gabriel proclaimed: “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; therefore the child to be born will be called holy, the Son of God” (Lk 1:35).

(...) Two references are obvious: the first is to the moment of the Creation. At the beginning of the Book of Genesis we read that “the Spirit of God was moving over the face of the waters” (1:2); this is the Creator Spirit who gave life to all things and to the human being. What is brought about in Mary, through the action of this same divine Spirit, is a new creation: God, who called forth being from nothing, by the Incarnation gives life to a new beginning of humanity. The Fathers of the Church sometimes speak of Christ as the new Adam in order to emphasize that the new creation began with the birth of the Son of God in the Virgin Mary’s womb. This makes us think about how faith also brings us a newness so strong that it produces a second birth. Indeed, at the beginning of our life as Christians there is Baptism, which causes us to be reborn as children of God and makes us share in the filial relationship that Jesus has with the Father.

And I would like to point out that Baptism is received, we “are baptized” — it is passive — because no one can become a son of God on his own. It is a gift that is freely given….Only if we open ourselves to God’s action, like Mary, only if we entrust our life to the Lord as to a friend whom we totally trust, will everything change, will our whole life acquire a new meaning, a new aspect: that of children with a father who loves us and never deserts us.

Benedict XVI, general audience of January 2, 2013