CCC2676 This twofold movement of prayer to Mary has found a privileged expression in the Ave Maria:
Hail Mary [or Rejoice, Mary]: the greeting of the angel Gabriel opens this prayer. It is God himself who, through his angel as intermediary, greets Mary. Our prayer dares to take up this greeting to Mary with the regard God had for the lowliness of his humble servant and to exult in the joy he finds in her.30
Full of grace, the Lord is with thee: These two phrases of the angel’s greeting shed light on one another. Mary is full of grace because the Lord is with her. The grace with which she is filled is the presence of him who is the source of all grace. "Rejoice . . . O Daughter of Jerusalem . . . the Lord your God is in your midst."31
Mary, in whom the Lord himself has just made his dwelling, is the daughter of Zion in person,
the ark of the covenant, the place where the glory of the Lord dwells. She is "the dwelling of God . . . with men."32 Full of grace, Mary is wholly given over to him who has come to dwell in her and whom she is about to give to the world.
Blessed art thou among women and blessed is the fruit of thy womb, Jesus. After the angel’s greeting, we make Elizabeth’s greeting our own. “Filled with the Holy Spirit,” Elizabeth is the first in the long succession of generations who have called Mary "blessed."33 "Blessed is she who believed. . . . "34 Mary is “blessed among women” because she believed in the fulfillment of the Lord’s word. Abraham, because of his faith, became a blessing for all the nations of the earth.35 Mary, because of her faith, became the mother of believers, through whom all nations of the earth receive him who is God’s own blessing: Jesus, the “fruit of thy womb.” ]
End of CCC. I added the bold print in CCC2676
Mary Ark of the Covenant: [2Maccabees2:4 It was also contained in the same writing, how the prophet, being warned by God, commanded that the tabernacle and the ark should accompany him, till he came forth to the mountain " where Moses went up, and saw the inheritance of God. 5 And when Jeremias came thither he found a hollow cave: and he carried in thither the tabernacle, and the ark, and the altar of incense, and so stopped the door. 6 Then some of them that followed him, came up to mark the place: but they could not find it. 7 And when Jeremias perceived it, he blamed them, saying: **The place shall be unknown, till God gather together the congregation of the people, and receive them
to mercy. 8 And
then the Lord will shew these things, and the majesty of the Lord shall appear, and there shall be a cloud as it was also shewed to Moses, "and he shewed it when Solomon prayed that the place might be sanctified to the great God.] DRA Bible.
It is Christ who came to gather His people unto
mercy, fulfilling the Law. The cloud of glory is the Holy Spirit, which overshadowed Mary the ark. Just as the glory of the Lord in Moses’ time, overshadowing the tabernacle, and Solomon’s time when dedicating the temple.
[Hb9:3 And after the second veil, the tabernacle which is called the Holiest of all; 4 Which had the golden censer, and **the ark of the covenant overlaid round about with gold,
wherein was the golden pot that had
manna, and Aaron’s rod that budded, and the
tables of the covenant;]
Mary the ark of the new covenant, not made by hands, contained in her womb. The real manna, the living Bread of Life, Christ. The real High Priest, Christ, and the written tables, the real living Word of God, Christ. Not just symbols, as the ark made by hands contained, but the actual realities.
[EX 40:34 Then a cloud covered the tent of the congregation and the glory of the LORD filled the tabernacle 35 And Moses was not able to enter into the tent of the congregation because the cloud abode thereon and the glory of the LORD filled the tabernacle]
[LK 1:35 And the angel answered and said unto her The Holy Ghost shall come upon thee and the power of the Highest shall overshadow thee therefore also that holy thing which shall be born of thee shall be called the Son of God]
Church Fathers Mary ark of covenant.
catholicfidelity.com/apologetics-topics/mary/church-fathers-on-mary-as-ark-of-the-new-covenant/