Mary is God's garden of Paradise, His own unspeakable world, into which His Son entered to do wonderful things, to tend it and to take His delight in it. He created a world for the wayfarer, that is, the one we are living in. He created a second world -- Paradise -- for the Blessed. He created a third for Himself, which He named Mary. She is a world unknown to most mortals here on earth. Even the angels and saints in heaven find her incomprehensible, and are lost in admiration of a God who is so exalted and so far above them, so distant from them, and so enclosed in Mary, His chosen world, that they exclaim: "Holy, holy, holy" unceasingly.
Happy, indeed sublimely happy, is the person to whom the Holy Spirit reveals the secret of Mary, thus imparting to him true knowledge of her. Happy the person to whom the Holy Spirit opens this enclosed garden for him to enter, and to whom the Holy Spirit gives access to this sealed fountain where he can draw water and drink deep draughts of the living waters of grace. That person will find only God and no creature in the most lovable Virgin Mary. But he will find that the infinitely holy and exalted God is at the same time infinitely solicitous for him and understands his weaknesses. There is no place where God can be more present to His creature and more sympathetic to human weakness than in Mary. It was indeed for this very purpose that He came down from heaven. Everywhere else He is the Bread of the strong and the Bread of angels, but living in Mary He is the Bread of children.
Mary was created only for God, and it is unthinkable that she should reserve even one soul for herself. On the contrary she leads every soul straight to God and to union with Him. The more a person joins himself to her, the more effectively she unites him to God. When we say "Mary," she re-echoes "God."
If we wish to go to Him, seeking union with Him, we must use the same means He used in coming down from heaven to assume our human nature and to impart His graces to us. That means was a complete dependence on Mary His Mother, which is true devotion to her.
~"Secret of Mary" by Saint Louis Marie de Montfort~