All the true children of God, the predestinate, have God for their Father and Mary for their Mother. He who has not Mary for his Mother has not God for his Father. 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.

 (True Devotion to Mary #30-St. Louis De Montfort:)