True Devotion to Mary - Saint Louis De Montfort - Bog

Mary is the Queen of heaven and earth by grace, as Jesus is the King of them by nature and by conquest. Now, as the kingdom of Jesus Christ consists principally in the heart and interior of a man-according to that word, "The kingdom of God is within you,"-in like manner the kingdom of our Blessed Lady is principally in the interior of a man, that is to say, his soul; and it is principally in souls that she is more glorified with her Son than in all visible creatures, and that we can call her, as the Saints do, the Queen of hearts.

We must conclude that, the most holy Virgin being necessary to God by a necessity which we call hypothetical, in consequence of His Will, she is far more necessary to men, in order for them to arrive at their Last End. We must not confound devotions to our Blessed Lady with devotions to the other Saints, as if devotion to her was not far more necessary than devotion to them, or as if devotion to her were a matter of supererogation.