To understand this prayer we must recall the Gospel, and precisely when it is said that "the Holy Spirit will come upon you, and the power of the Most High will overshadow you" (Lk 1:35). The Angel's word to Mary then recalls the presence of the Glory of God in the sanctuary built in the desert, indicating that Mary is the new and true Sanctuary, the place where God places his tent among us, of which the ancient it was only a shadow and a figure: «then the cloud covered the tent of meeting and the Glory of the Lord filled the Abode. Moses could not enter the tent of meeting, because the cloud was over it and the glory of the Lord filled the house" (Ex 40, 34-35).

And so the evangelist John states: "the Word became flesh and lived - literally: he placed his tent - among us" (Jn 1, 14).

We see how the words of Scripture intertwine and refer to each other, overlapping and thus illuminating each other. Thus the entire episode of the annunciation literally refers to what was said by the prophet Zechariah: «Rejoice, daughter of Zion, [...], and rejoice with all your heart, daughter of Jerusalem [...] the Lord your God in the midst of you are a mighty savior" (Zeph 3, 14 -17). “Rejoice”, cháire in Greek, is the verb used by the angel, the one we usually translate as “hail”, or, in Latin, as “ave”; Mary is the daughter of Jerusalem par excellence, because in her lives the faith and expectation of Israel; the Virgin will rejoice with all her heart, that is, she will magnify the Lord, who is "in her midst", that is, in the strictest and most literal sense possible, "in" her, in her womb, is a "savior", that is, Jesus , which means “God saves”.

In this way we understand how the Heart of Jesus was formed in the womb of the Virgin by the Holy Spirit. And it is still formed in the womb of the Church: we observe how Christ is flesh in the body of Mary, but he is also flesh in his mystical body, the Church, in the Eucharist, since he says that «my flesh - that is, my body - is true food" (Jn 6, 55). Thus the altar on which we place the bread and wine, on which we invoke the Holy Spirit, becomes like the womb, the fertile womb, of the Church, where Christ is born among us, as if on a new manger, every time like in Bethlehem. Christ then is truth in the heart of Mary, and it is also the truth that illuminates our hearts: he himself is formed and born in us through faith, aroused in us by the Holy Spirit. Mary is therefore image, icon and type of the Church, and therefore of every faithful soul.

Christ is born in Mary and thus also born in us. We become, with Mary, bearers of Christ, or rather his mother, in a true and precise sense: "Whoever does the will of God is my brother, sister and mother" (Mk 3, 35). The Heart of Christ is formed in us when we learn to choose and desire for ourselves what he chose and desired for himself, that is, all humility, meekness and patience.