The Apostle Paul, writing to the Corinthians, insists that being Christian means believing that Christ is truly risen from the dead. Our whole faith is based upon this fundamental truth which is not an idea but an event. Even the mystery of Mary's Assumption body and soul is fully inscribed in the resurrection of Christ. The Mother's humanity is "attracted" by the Son in his own passage from death to life. Once and for all, Jesus entered into eternal life with all the humanity he had drawn from Mary; and she, the Mother, who followed him faithfully throughout her life, followed him with her heart, and entered with him into eternal life which we also call heaven, paradise, the Father's house.
Mary also experienced the martyrdom of the Cross: the martyrdom of her heart, the martyrdom of her soul. She lived her Son's Passion to the depths of her soul. She was fully united to him in his death, and so she was given the gift of resurrection. Christ is the first fruits from the dead and Mary is the first of the redeemed, the first of "those who are in Christ". She is our Mother, but we can also say that she is our representative, our sister, our eldest sister, she is the first of the redeemed, who has arrived in heaven. - Pope Francis
