“Inasmuch as grace perfects nature, and glory perfects grace, it is certain that Our Lord is still, in Heaven, as much the Son of Mary as He was on earth; and that, consequently, He has retained the obedience and submission of the most perfect Child toward the best of all mothers. But we must take great pains not to conceive this dependence as any abasement or imperfection in Jesus Christ. For Mary is infinitely below her Son, who is God, and therefore she does not command Him as a mother here below would command her child who is below her. Mary, being altogether transformed into God by grace and by the glory which transforms all the saints into Him, asks nothing, wishes nothing, and does nothing contrary to the eternal and immutable will of God. When we read in the writings of Sts. Bernard, Bernadine, Bonaventure and others that in Heaven and on earth everything, even God Himself, is subject to the Blessed Virgin, they mean that the authority which God has been well pleased to give her is so great that it seems as if she had the same power as God; and that her prayers and petitions are so powerful with God that they always pass for commandments with His Majesty, who never resists the prayer of His dear Mother, because she is always humble and conformed to His will.
If Moses, by the force of his prayer, stayed the anger of God against the Israelites in a manner so powerful that the most high and infinitely merciful Lord, being unable to resist him, told him to let Him alone that He might be angry with and punish that rebellious people, what must we not, with much greater reason, think of the prayer of the humble Mary, that worthy Mother of God, which is more powerful with His Majesty than the prayers and intercessions of all the Angels and Saints both in Heaven and on earth.”
Saint Louis de Montfort continues,
“All the true children of God, the predestinate, have God for their Father and Mary for their Mother. This is the reason why the reprobate, such as heretics, schismatics and others, who hate our Blessed Lady or regard her with contempt and indifference, have not God for their Father, however much they boast of it, simply because they have not Mary for their Mother. For if they had her for their Mother, they would love and honor her as a true child naturally loves and honors the mother who has given him life.”
-Saint Louis de Montfort, True Devotion to Mary-
– Lucas G. Westman