The consecration to Mary, as taught by St. Louis de Montfort, is really a consecration to Jesus through Mary. She is not an end but the greatest means to the end which is her Divine Son.
Saint Louis wanted all Catholics to imitate Mary's virtues as she was her Son's most perfect disciple. He wished that all come to Christ through her motherly solicitude and maternal guidance, as Christ chose to come to us through her.
As a great Marian theologian St. Louis anticipated the Church's proclamation of the fifth Marian dogma, which encompasses Our Lady's three-fold role as our Advocate, Co-Redemptrix and Mediatrix of all Graces. These are three distinct ways Christ draws us to Himself through her spiritual motherhood. They build on the fact that she is immaculately conceived, ever-virgin, Mother of God and assumed into Heaven.
As our Advocate, Mary pleads for us before the throne of her Son, the just Judge. As Co-Redemptrix Mary helped win for us grace by mingling her tears of compassion at the foot of the Cross with the blood of her Son's Passion during His act of redemption. Finally, as Mediatrix of all Graces, the Queen of Heaven dispenses the graces accrued for us by her Son, the King of Heaven.
All this and more are contained in the writings left to us by St. Louis de Montfort.
Watch the panel discuss the need to practice Marian devotion in The Download—St. Louis de Montfort.