In Assumptione Beatae Mariae Virginis

Signum magnum appáruit in cœlo: múlier amicta sole, et luna sub pédibus ejus, et in cápite ejus coróna stellárum duódecim. Ap. 12: 1

This day the holy and animated Ark of the living God, which had held within it its own Maker, is borne to rest in that Temple of the Lord, which is not made with hands. David, whence it sprang, leapeth before it, and in company with him the Angels dance, the Archangels sing aloud, the Virtues ascribe glory, the Princedoms shout for joy, the Powers make merry, the Lordships rejoice, the Thrones keep holiday, the Cherubim utter praise, and the Seraphim proclaim its glory. This day the Eden of the new Adam receiveth the living garden of delight, wherein the condemnation was annulled, wherein the Tree of Life was planted, wherein our nakedness was covered.

This day the stainless maiden, who had been defiled by no earthly lust, but ennobled by heavenly desires, returned not to dust, but, being herself a living heaven, took her place among the heavenly mansions. From her true life had flowed for all men, and how should she taste of death? But she yielded obedience to the law established by Him to Whom she had given birth, and, as the daughter of the old Adam, underwent the old sentence, which even her Son, Who is the very Life Itself, had not refused; but, as the Mother of the living God, she was worthily taken by Him unto Himself.

                                                                              

  -From the Sermons of St. John of Damascus.

2nd on the Falling-asleep of Blessed Mary.

Since indeed the universal Church hath at all times and throughout the ages manifested faith in the bodily Assumption of the Blessed Virgin Mary, and since the Bishops of the whole world by an almost unanimous agreement have petitioned that this truth, which is enshrined in Sacred Scripture and deeply rooted in the souls of Christ's faithful, and is also truly in accord with other revealed truths, should be defined as a dogma of the divine and Catholic Faith, Pope Pius XII, acceding to the requests of the whole Church, decreed that this privilege of the Blessed Virgin Mary be solemnly proclaimed, and thus, on the first day of November of the year of the Great Jubilee, nineteen hundred and fifty, at Rome, in the open square before the Basilica of St. Peter, surrounded by a throng of many Cardinals and Bishops of the Holy Roman Church who had come from distant parts of the earth, and before a great multitude of the faithful, with the whole Catholic world rejoicing, proclaimed in these words and with infallible statement the bodily Assumption of the Blessed Virgin Mary into heaven:

"Wherefore, having offered to God continual prayers of supplication, and having invoked the light of the Spirit of Truth, to the glory of Almighty God who hath enriched the Virgin Mary with his special favour; in honour of his Son, the immortal King of ages and victor over sin and death; for the increase of the glory of the same august Mother, and for the joy and exultation of the whole Church, by the authority of Our Lord Jesus Christ, of the holy Apostles Peter and Paul, and by our own authority, we pronounce, declare and define it to be a divinely revealed dogma that: The Immaculate Mother of God, Mary ever Virgin, was, at the end of her earthly life, assumed body and soul into heavenly glory."

From the Acts of Pope Pius XII