by Fr. Carlo Magno Saa, FSSPX
When a source is infected, everything that comes from it is corrupted. Adam was the source of human nature; when he sinned, our human nature was corrupted in him. Such was our pitiable state until a Savior was promised to us. Yet, that Savior would not come as a grown-up man. No, he will come as a baby, a son of Adam. So, a worthy mother is needed for him. Therefore, in the one and same eternal decree of the Incarnation was contained the Immaculate Conception.
All the children of Adam inherited his corrupted nature. Yet between God and sin there is a complete and total contradiction. Foreseeing the merits of her Son, God the Father prevented her from inheriting Adam’s guilt. Although conceived like the rest of us, God the Son applied to her first, the fruits of His redemption. God the Holy Ghost made her His purest temple and fruitful spouse. All of that is implied in the very first prophecy of the Bible: “I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel.” (Gen 3:15)
The angel Gabriel who commanded Zachary, has to bow down and greet Mary: “Hail, full of grace, the Lord is with thee.” (Lk 1:28) Meaning, before she conceived Christ in her womb, she already conceived Him in her Immaculate Heart. Truly, her Immaculate Conception is greater than the Original Justice lost by Adam. So, whenever God thinks of a pure and perfect creature, He thinks of Mary!