Dom Gueranger writes, "This truth of Mary's Immaculate Conception—which was revealed to the Apostles by the Divine Son of Mary, inherited by the Church, taught by the holy fathers, believed by each generation of the Christian people with an ever increasing explicitness—was implied in the very notion of a Mother of God. To believe that Mary was Mother of God, was implicitly to believe that she, on whom this sublime dignity was conferred, had never been defiled with the slightest stain of sin, and that God had bestowed upon her an absolute exemption from sin." This was the first grace God gave Mary, her Immaculate Conception. The second major grace was her vocation to be the Mother of the Savior. The third major grace was that she would remain a Virgin, since it is the power of the Holy Spirit that will overshadow her. Her response, without fully understanding the mystery taking place, was a simple but total yes to God's will. The first major grace God gave us was to be reconciled to himself through the death and resurrection of Jesus in the waters of Baptism. Even though we have sinned many times since, God forgives us and restores us to himself. Like Mary, without understanding this mystery of love, our response is also a simple but total yes to God's will in our lives.