The Devil fears the Virgin Mary more, not only than men and angels but, in a certain sense, than God himself. It is not that the wrath, the power and the hatred of God are not infinitely greater than those of the Blessed Virgin, since Mary’s perfections are limited: it is because, in the first place, Satan, being proud, suffers infinitely more from being overcome and punished by the little, humble servant of God, her humility humiliating him more than the divine power; and secondly, because God has given Mary such great power over devils that, as they have often been obliged to admit, in spite of themselves, through the mouths of possessed persons, they are more afraid of one of her sighs of grief over some poor soul, than of the prayers of the saints, and more daunted by a single threat from her than by all their other torments.

-Monsignor Leon Cristiani