Why do Catholics sometimes refer to Mary as the Ark of the Covenant?
Because our Dear Lady is The Ark of the Covenant! An Ark is a container. Noah's ark became a saving vehicle; a precurser to the later Ark of the Covenant that contained the written word of God. Mary is the vehicle, or container if you will, that held the WORD MADE FLESH! The true Word of God. She is the salvific vehicle through which the Savior of the world was born. God stressed the perfection and the holiness of the Ark of the Covenant to point out the holiness of Mary - the New Ark of the Covenant. Jesus is the Covenant, Mary is the Ark. This may not go over well with a few of my brothers and sisters in Christ so I will try to explain it through Holy Scripture in my next post . Bear with me, please:)