"Mary, who is the Virgin Most Pure, is also the Refuge of Sinners. She knows what sin is, not by the experience of its fall, not by tasting its bitter regrets, bit by seeing what it did to Her Divine Son."
Matthew 16:19. And I will give to thee the keys of the kingdom of heaven. And whatsoever thou shalt bind upon earth, it shall be bound also in heaven: and whatsoever thou shalt loose upon earth, it shall be loosed also in heaven.