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.
--St. Louis de Montfort, The Secret of Mary, 12.