Since Mary produced the head of the elect, Jesus Christ, she must also produce the members of that head, that is, all true Christians. A mother does not conceive a head without members, nor members without a head. If anyone, then, wishes to become a member of Jesus Christ, and consequently be filled with grace and truth , he must be formed in Mary through the grace of Jesus Christ, which she possesses with a fullness enabling her to communicate it abundantly to true members of Jesus Christ, her true children.
--Saint Louis Marie de Montfort