II. . . . Born of the Virgin Mary
487
What the Catholic faith believes about Mary is based on what it believes about Christ, and what it teaches about Mary illumines in turn its faith in Christ.
Mary’s predestination
488
“God sent forth his Son,” but to prepare a body for him,125 he wanted the free cooperation of a creature. For this, from all eternity God chose for the mother of his Son a daughter of Israel, a young Jewish woman of Nazareth in Galilee, “a virgin betrothed to a man whose name was Joseph, of the house of David; and the virgin’s name was Mary”:126
The Father of mercies willed that the Incarnation should be preceded by assent on the part of the predestined mother, so that just as a woman had a share in the coming of death, so also should a woman contribute to the coming of life.127
489
Throughout the Old Covenant the mission of many holy women prepared for that of Mary. At the very beginning there was Eve; despite her disobedience, she receives the promise of a posterity that will be victorious over the evil one, as well as the promise that she will be the mother of all the living.128 By virtue of this promise, Sarah conceives a son in spite of her old age.129 Against all human expectation God chooses those who were considered powerless and weak to show forth his faithfulness to his promises: Hannah, the mother of Samuel; Deborah; Ruth; Judith and Esther; and many other women.130 Mary "stands out among the poor and humble of the Lord, who confidently hope for and receive salvation from him. After a long period of waiting the times are fulfilled in her, the exalted Daughter of Sion, and the new plan of salvation is established."131
The Immaculate Conception
490
To become the mother of the Savior, Mary "was enriched by God with gifts appropriate to such a role."132 The angel Gabriel at the moment of the annunciation salutes her as "full of grace."133 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.
491
Through the centuries the Church has become ever more aware that Mary, “full of grace” through God,134 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.135
492
The “splendor of an entirely unique holiness” by which Mary is “enriched from the first instant of her conception” comes wholly from Christ: she is "redeemed, in a more exalted fashion, by reason of the merits of her Son."136 The Father blessed Mary more than any other created person “in Christ with every spiritual blessing in the heavenly places” and chose her "in Christ before the foundation of the world, to be holy and blameless before him in love."137
493
The Fathers of the Eastern tradition call the Mother of God “the All-Holy” (Panagia) and celebrate her as "free from any stain of sin, as though fashioned by the Holy Spirit and formed as a new creature."138 By the grace of God Mary remained free of every personal sin her whole life long.
For more
usccb.org/catechism/text/pt1sect2chpt2art3p2.htm
usccb.org/catechism/text/pt1sect2chpt3art9p6.htm#963