17. In the liturgical books which deal with the feast either of the dormition or of the Assumption of the Blessed Virgin there are expressions that agree in testifying that, when the Virgin Mother of God passed from this earthly exile to heaven, what happened to her sacred body was, by the decree of divine Providence, in keeping with the dignity of the Mother of the Word Incarnate, and with the other privileges she had been accorded. Thus, to cite an illustrious example, this is set forth in that sacramentary which Adrian I, our predecessor of immortal memory, sent to the Emperor Charlemagne. These words are found in this volume: "Venerable to us, O Lord, is the festivity of this day on which the holy Mother of God suffered temporal death, but still could not be kept down by the bonds of death, who has begotten your Son our Lord incarnate from herself."
21. Thus St. John Damascene, an outstanding herald of this traditional truth, spoke out with powerful eloquence when he compared the bodily Assumption of the loving Mother of God with her other prerogatives and privileges. "It was fitting that she, who had kept her virginity intact in childbirth, should keep her own body free from all corruption even after death. It was fitting that she, who had carried the Creator as a child at her breast, should dwell in the divine tabernacles. It was fitting that the spouse, whom the Father had taken to himself, should live in the divine mansions. It was fitting that she, who had seen her Son upon the cross and who had thereby received into her heart the sword of sorrow which she had escaped in the act of giving birth to him, should look upon him as he sits with the Father. It was fitting that God's Mother should possess what belongs to her Son, and that she should be honored by every creature as the Mother and as the handmaid of God."
35. In like manner St. Francis de Sales, after asserting that it is wrong to doubt that Jesus Christ has himself observed, in the most perfect way, the divine commandment by which children are ordered to honor their parents, asks this question: "What son would not bring his mother back to life and would not bring her into paradise after her death if he could?" And St. Alphonsus writes that "Jesus did not wish to have the body of Mary corrupted after death, since it would have redounded to his own dishonor to have her virginal flesh, from which he himself had assumed flesh, reduced to dust."
Pius XII carefully did not define whether or not Mary died. He spoke of her having completed the course of her life on earth. The Eastern churches lean toward her having died, while in the West the overwhelming opinion is that she did not.