Some of the prayers of St. Gregory Thaumaturgus bring this out well:
"In her body she made an earthly home for the Eternal Word, that through the body and blood He assumed from her He might make an eternal home for her and all her race. “‘Arise, O Lord, into Your rest, You, and the ark of Your sanctuary.’ For the holy Virgin is truly an ark, made with gold within and without, who has received the whole treasury of the Holy of Holies.”
“Only to Mary the pure virgin did the archangel Gabriel manifest himself in brilliant light, bringing her the glad address, “Hail, you who are highly favored!” And thus she received the Word, and soon, in time, through the body’s natural process, she gave birth to the dear Pearl. Come, then, you, too, dearly beloved, and let us chant the melody that has been taught us by the inspired harp of David, and say, “Arise, O Lord, into Your rest, You, and the ark of Your sanctuary.” For the holy Virgin is truly an ark, made with gold both within and without, who has received the whole treasury of the Holy of Holies. “Arise, O Lord, into Your rest.” Arise, O Lord, out of the bosom of the Father, in order that You may raise up the fallen race of the first man.”
or, as one Lutheran pastor of mine put it in his Christmas sermon: No one gets Christmas who doesn’t get the tabernacle. That first reading was not at all incongruous with the Mystery we celebrate today. It was the very unfolding of its deepest meaning. For just as God long ago chose in His mercy to dwell in a tent among His people that He might bring them into communion with Himself and give them a share in His divine life, so when the fullness of time came, God pitched His tent in an extraordinary manner among men. The tent this last and final time was not made of animal skin, but of a holy Virgin. God dwelt in Her flesh as in the Tabernacle, making her to be the living Ark, and thus disclosed to us the most astonishing thing about God’s plan for the human race.