John, in the first chapter of his gospel, states that Jesus was the Word made flesh, through Him all things were made, and He lived and dwelt amongst us. Not just a part of God, not just a nature, but a person who was, is and has always been 100% divine. The second person of the Trinity came and lived among us. Therefore it is correct to say that Mary was the God Bearer or the Mother of God. She is the living shrine of the Word of God.
Inside the Ark of the Old Covenant, there was the word of God inscribed in stone. In the Ark of the New Covenant, there was the word of God in human flesh. In the Old, there was the urn filled with manna from the wilderness. In the New, Mary's womb carries Jesus, the bread of life come down from heaven. In the Old, we had the rod of Aaron. In the New, we have our great high priest.
Mary is not God, she is not worshipped and she is not our Saviour. However she is given a place of honour due to the role she has played in our salvation.