What Lucifer lost by pride Mary won by humility. What Eve ruined and lost by disobedience Mary saved by obedience. By obeying the serpent, Eve ruined her children as well as herself and delivered them up to him. Mary by her perfect fidelity to God saved her children with herself and consecrated them to his divine majesty.
God has established not just one enmity but “enemies”, and not only between Mary and satan but between her race and his race. That is, God has put enmities, antipathies and hatreds between the true children and servants of the Blessed Virgin and the children and slaves of the devil. They have no love and no sympathy for each other. The children of Belial, the slaves of satan, the friends of the world- for they are all one and the same-have always persecuted and will persecute more than ever in the future those who belong to the Blessed Virgin, just as Cain of old persecuted his brother Abel, and Esau his brother Jacob. These are the types of the wicked and of the just. But the humble Mary will always triumph over satan, the proud one, and so great will be her victory that she will crush his head, the very seat of his pride. She will unmask his serpant’s cunning and expose his wicked plots. She will scatter to the winds his devilish plans and to the end of time will keep her faithful servants safe from his cruel claws.
But Mary’s power over the evil spirits will especially shine forth in the latter times, when satan will lie in wait for her heel, that is, for her humble servants and her poor children whom she will rouse to fight against him. In the eyes of the world they will be little and poor and, like the heel, lowly in the eyes of all, down-trodden and crushed as is the heel by the other parts of the body. But in compensation for this they will be rich in God’s graces, which will be abundantly bestowed on them by Mary. They will be great and exalted before God in holiness. They will be superior to all creatures by their great zeal and so strongly will they be supported by divine assistance that, in union with Mary, they will crush the head of satan with their heel, that is, their humility, and bring victory to Jesus Christ.
St. Louis De Montfort