Mary is God's garden of Paradise

What a difference there is between a soul brought up in the ordinary way to resemble Jesus Christ by people who, like sculptors, rely on their own skill and industry, and a soul thoroughly tractable, entirely detached, most ready to be molded in her by the working of the Holy Spirit. 

What blemishes and defects, what shadows and distortions, what natural and human imperfections are found in the first soul, and what a faithful and divine likeness to Jesus is found in the second!

There is not and there will never be, either in God's creation or in his mind, a creature in whom he is so honored as in the most Blessed Virgin Mary, not excepting even the saints, the cherubim or the highest seraphim in heaven. 

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. 

Saint Louis de Montfort (1673-1716)

In The Secret of Mary, part 1: Necessity of having a true devotion to Mary