*Exodus 25:16 **In the ark you are to put the covenant which I will give you. ***
21 This cover you shall then place on top of the ark. In the ark itself you are to put the covenant which I will give you. 22 There I will meet you and there, from above the cover, between the two cherubim on the ark of the covenant, I will tell you all that I command you regarding the Israelites.
The Ark contains the covenant of the Lord. Mary contained the Lord Himself, who IS the the New Covenant.
Numbers 4:5 In breaking camp, Aaron and his sons shall go in and take down the screening curtain and cover the ark of the covenant with it.
15 Only after Aaron and his sons have finished covering the sacred objects and all their utensils on breaking camp, can the Kohathites enter to carry them. But they shall not touch the sacred objects; if they do they will die. These, then, are the objects in the tent of meeting that the Kohathites shall carry. 16 Eleazar, son of Aaron the priest, shall be in charge of the oil for the light, the fragrant incense, the established grain offering, and the anointing oil. He shall be in charge of the whole tabernacle with all the sacred objects and utensils that are in it. 17 The LORD said to Moses and Aaron: 18 Do not let the group of Kohathite clans perish from among the Levites. 19 That they may live and not die when they approach the most sacred objects, this is what you shall do for them: Aaron and his sons shall go in and assign to each of them his task and what he must carry; 20** but the Kohathites shall not go in to look upon the sacred objects even for an instant, or they will die**.
Note the care that is taken, and how holy objects that are reserved to God are handled, and must be respected, and not to be touched.
2 Sam 6:1 David again assembled all the picked men of Israel, thirty thousand in number. 2 Then David and all the people who were with him set out for Baala of Judah to bring up from there the ark of God, which bears the name “the LORD of hosts enthroned above the cherubim.” 3 They transported the ark of God on a new cart and took it away from the house of Abinadab on the hill. Uzzah and Ahio, sons of Abinadab, were guiding the cart, 4
with Ahio walking before it, 5 while David and all the house of Israel danced before the LORD with all their might, with singing, and with lyres, harps, tambourines, sistrums, and cymbals. 6 As they reached the threshing floor of Nodan, Uzzah stretched out his hand to the ark of God and steadied it, for the oxen were tipping it. 7 Then the LORD became angry with Uzzah; God struck him on that spot, and he died there in God’s presence. 8 David was angry because the LORD’s wrath had broken out against Uzzah. Therefore that place has been called Perez-uzzah even to this day. 9 David became frightened of the LORD that day, and he said, “How can the ark of the LORD come to me?” 10 So David was unwilling to take the ark of the LORD with him into the City of David. David deposited it instead at the house of Obed-edom the Gittite. 11 The ark of the LORD remained in the house of Obed-edom the Gittite for three months, and the LORD blessed Obed-edom and all his household. 12 When it was reported to King David that the LORD had blessed the household of Obed-edom and all that he possessed because of the ark of God, David went to bring up the ark of God from the house of Obed-edom into the City of David with joy. 13 As soon as the bearers of the ark of the LORD had advanced six steps, he sacrificed an ox and a fatling. 14 Then David came dancing before the LORD with abandon, girt with a linen ephod. 15 David and all the house of Israel were bringing up the ark of the LORD with shouts of joy and sound of horn. 16 As the ark of the LORD was entering the City of David, Michal, daughter of Saul, looked down from her window, and when she saw King David jumping and dancing before the LORD, she despised him in her heart. 17 They brought in the ark of the LORD and set it in its place within the tent which David had pitched for it. Then David sacrificed burnt offerings and communion offerings before the LORD.
Notice, the activities done in the presence of the Ark is done “before the Lord”. And also, notice how David is incorrectly bringing up the Ark in a cart, when it was declared that it was to always be carried by the poles by Kohathites.
We should carefully study the Old Covenant (OT), to better understand the New Covenant (NT).