The second time in which Mary brought us forth to grace was when, on Calvary, she offered to the eternal Father, with so much sorrow of heart, the life of her beloved Son for our salvation. Wherefore, St. Augustine asserts, that, having then co-operated by her love with Christ in the birth of the faithful to the life of grace, she became also by this co-operation the spiritual mother of us all, who are members of our head, Jesus Christ.
This is also the meaning of what is said of the blessed Virgin in the sacred Canticles: “They have made me the keeper in the vineyards; my vineyard I have not kept.” Mary, to save our souls, was willing to sacrifice the life of her Son, as William the Abbot remarks. And who was the soul of Mary, but her Jesus, Who was her life and all her love? Wherefore St. Simeon announced to her that her soul would one day be pierced by a sword of sorrow; which was the very spear that pierced the side of Jesus, Who was the soul of Mary.