"And as Luke tells us, Mary was the first of us to submit fully to the will of God"
Jesus tells us that those that do God's will are like brothers, sisters and a mother to him. But wait! I thought she was far closer than we could ever be!
If you read your Dante, you will see what we mean by "closer." To be closer to God is to be holy, and the saints who are most holy are the "closest."