from St. Louis de Montfort:

Lastly, you never think of Mary without Mary thinking of God for you.  You never praise of honor Mary without Mary joining you in praising and honoring God.  Mary is entirely relative to God.  Indeed I would say that she was relative only to God, because she exists uniquely in reference to him.

She is an echo of God, speaking and repeating only God.  If you say ‘Mary’ she says ‘God’.  When St. Elizabeth praised Mary calling her blessed because she had believed, Mary, the faithful echo of God responded with her canticle, ‘My soul glorifies the Lord.’  What Mary did on that day, she does every day.  When we praise her, when we love and honor her, when we present anything to her, then God is praised, honored and loved and receives our gift through Mary and in Mary.