The two beautiful readings of today's liturgy prove well the special place that Mary has in the Kingdom of her Son. Isaiah announces first the "abundant joy" of salvation, similar to the happiness of the farmer who got a rich harvest, or of a nation after a great victory. So a great light is seen by the people who walked in darkness. This victory is the achievement of a child, a king given by God to humanity, a child with divine attributes. His kingdom reaches all humanity, the whole world. It is a Kingdom of justice and peace for ever.
Jesus, the Son of Mary, is Son of God, because in Him the work of reconciliation between God and us is worked. Yes, through Mary, God gives us His salvation.
In today's Gospel, St Luke explains how this started. The "yes" of Mary makes God our "neighbour", Emmanuel - God with us. What the effort of man wasn't able to do, the "yes" of a virgin realized. It was the availability of Mary to the will of the Father. And Mary is Queen because of Her mission: "God your God is in your midst, a mighty Saviour" (Zeph. 3:17). The Spirit of God transforms her. The new creation is born from the same source from which the first creation came to be: the Spirit. Mary is Queen because she by the Holy Spirit, the Mother of the King.
For centuries this has been the belief of Christianity. Mary the Queen, transformed by the Holy Spirit gave us Jesus, the King.
Hail, Holy Queen, Mother of Mercy pray for us.