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What is the Immaculate Conception and why does it matter?

VIRGIN MARY STATUE
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A brief guide to a great mystery of the Christian faith.

In the liturgical calendar of the Roman Rite of the Catholic Church, there exists the Solemnity of the Immaculate Conception of the Virgin Mary on December 8. It is a feast that is often confused with the conception of Jesus Christ, which is celebrated with the Solemnity of the Annunciation on March 25 (nine months before Christmas day).

What does the “Immaculate Conception” mean?

The Catechism of the Catholic Church lays out a basic definition.

To become the mother of the Savior, Mary “was enriched by God with gifts appropriate to such a role.” The angel Gabriel at the moment of the annunciation salutes her as “full of grace.” In fact, in order for Mary to be able to give the free assent of her faith to the announcement of her vocation, it was necessary that she be wholly borne by God’s grace.

Through the centuries the Church has become ever more aware that Mary, “full of grace” through God, was redeemed from the moment of her conception. That is what the dogma of the Immaculate Conception confesses, as Pope Pius IX proclaimed in 1854:

The most Blessed Virgin Mary was, from the first moment of her conception, by a singular grace and privilege of almighty God and by virtue of the merits of Jesus Christ, Savior of the human race, preserved immune from all stain of original sin. (CCC 490-491)

It is a difficult teaching to understand, as it centers on the teaching that God applied the merits of Jesus’ sacrifice on the cross to the Virgin Mary at the moment of her conception.

The Canonry of St. Leopold expounded on this truth, as described in a previous article at Aleteia.

[God] took the grace and salvation which would come from His plan to enter into the world, become a man, suffer, die and rise, and he gave the grace to Mary before He actually did it.

This is not a time-traveling episode in a science fiction series (although maybe we are fascinated with time travel because of the Immaculate Conception!) but rather what the theologians call prevenient grace, the grace that worked before (in time!) its source had appeared!

So, God lifted up Mary with this grace—to be, as it were, as if it had been she, Mary, in the Garden, without the burden of Original Sin. And so, she is the Immaculate Conception – conceived in the womb of her mother without the stain of Original Sin.

It is a great mystery of the Catholic faith, one that may be difficult to comprehend, but fits into the “logic” of salvation history. He sought to prepare a vessel for him to come into the world as Savior and Redeemer, and chose Mary, the daughter of Joachim and Ann, to fulfill his plan. It shows his tenderness to humanity and the great love he poured out upon the Virgin Mary, to grant her such a grace. He wanted the best for his earthly mother!

It may take many years of study before a person can even partially comprehend this dogma. If you struggle with this teaching, it is appropriate to say the prayer of the father whose son was cured by Jesus Christ, “I believe; help my unbelief!” (Mark 9:24).

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