The majesty of God surpasses by far our capacity for expression, because it is better to think of God than to talk of Him, and better is He still than what is thought.
(De Trinitate VII, 4,7)
Mary was happy because she listened and kept God's word. She kept the truth in her spirit more than in the flesh of her womb.
Let us love the Lord our God, let us love the Church. He, like a father; she, like a mother. He, like a master; she, like a servant. For we are the children of this very servant.