J.M.J. "118. Having read nearly every book on devotion to the Blessed Virgin and talked to the most saintly and learned people of the day, I can now state with conviction that I have never known or heard of any devotion to our Lady which is comparable to the one I am going to speak of. No other devotion calls for more sacrifices for God, none empties us more completely of self and self-love, none keeps us more firmly in the grace of God and the grace of God in us. No other devotion unites us more perfectly and more easily to Jesus. Finally no devotion gives more glory to God, is more sanctifying for ourselves or more helpful to our neighbor.
"119. As this devotion essentially consists in a state of soul, it will not be understood in the same way by everyone. Some--the great majority--will stop short at the threshold and go no further. Others--not many--will take but one step into its interior. Who will take a second step? Who will take a third? Finally who will remain in it permanently? Only the one to whom the Spirit of Jesus reveals the secret. The Holy Spirit Himself will lead this faithful soul from strength to strength, from grace to grace, from light to light, until at length he attains transformation into Jesus in the fullness of His age on earth and of His glory in Heaven."
--Saint Louis Marie Grignion de Montfort, Treatise on True Devotion to the Blessed Virgin, 118-119.