This is not merely a devotional opinion within Roman Catholicism. It is presented as a dogma of divine and Catholic faith. The Catechism of the Catholic Church repeats the teaching in paragraph 966, saying that Mary was taken body and soul into heavenly glory and that her Assumption is “a singular participation in her Son’s Resurrection” and an anticipation of the resurrection of other Christians.
The controversy, however, is often misunderstood. The issue is not simply whether Mary should be honored. Historic Christianity has long honored Mary as the Theotokos, the Mother of God, a title defended at the Council of Ephesus in AD 431 because it protects the truth that the one born of Mary is truly God the Son incarnate. Scripture itself gives a foundation for Marian honor: Gabriel calls Mary “full of grace” or “highly favored” in Luke 1:28; Elizabeth calls her “blessed among women” in Luke 1:42; Mary prophesies that “all generations will call me blessed” in Luke 1:48; and Mary is present with the apostolic community in prayer in Acts 1:14.
The deeper question is whether Mary’s bodily glorification can be defined as a binding, divinely revealed dogma for the universal Church by the Bishop of Rome. That is why the Assumption controversy is inseparable from papal authority.
From the Catholic side, the Assumption is not treated as a random late invention. Pius XII argues that the doctrine is rooted in the Church’s worship, theological reflection, episcopal consensus, and Scripture understood through sacred tradition. In Munificentissimus Deus, he says the doctrine is “based on the Sacred Writings,” “approved in ecclesiastical worship,” and “expounded and explained” by theologians.
But “based on Scripture” here does not mean that the New Testament directly narrates Mary being assumed into heaven. It does not. Rather, Catholic theology appeals to broader biblical themes. These include Genesis 3:15, where the woman and her seed are placed in opposition to the serpent; Luke 1:28 and 1:42, where Mary is uniquely blessed; Psalm 132:8, interpreted typologically in connection with the Ark; Revelation 11:19–12:1, where the Ark of the Covenant and the woman clothed with the sun appear in close sequence; and 1 Corinthians 15:21–26, 54–57, where Christ’s victory over death culminates in resurrection glory. Pius XII’s own endnotes cite several of these passages, including Psalm 132:8, Revelation 12:1, Luke 1:28, Genesis 3:15, Romans 5–6, and 1 Corinthians 15.
The strength of the Catholic argument is theological coherence: if Mary is uniquely united to Christ, if she is the New Eve associated with the New Adam, and if Christ conquers sin and death, then it is fitting that his Mother should share bodily in his victory. Pius XII reasons along these lines, saying that because Christ honored his mother perfectly, it is fitting to believe that he preserved her from the corruption of the tomb.
The weakness, from a critical or Orthodox perspective, is evidential. A doctrine may be theologically “fitting” without being clearly demonstrable as apostolic dogma. The Orthodox Church in America’s article on the Dormition is strikingly candid: the feast “commemorates the death, resurrection and glorification of Christ’s mother” and proclaims that Mary has been assumed by God into the heavenly kingdom, but it also states that “there are no biblical or historical sources for this feast.”
That Orthodox statement should not be misread as a rejection of the Dormition. Orthodoxy celebrates the Dormition deeply. The feast proclaims that Mary truly died, was raised by her Son, and participates already in the life of the Kingdom. The OCA even says the feast is a sign of the destiny prepared for all who hear and keep the Word of God.
This is why the Catholic-Orthodox divide over the Assumption is subtle. Orthodoxy is not saying, “Mary is unimportant.” Orthodoxy is saying that liturgical tradition, however beloved, should not be turned into a universally binding dogma by one bishop apart from an ecumenical council. The Orthodox objection is ecclesiological: Who has authority to define dogma for the whole Church?
Rome’s answer is clear. The Catholic Church teaches that the Pope, as successor of Peter, has “full, supreme, immediate, and universal power” over the Church. The Compendium of the Catechism says the Pope is the visible source and foundation of unity and has this power by divine institution. It also says infallibility is exercised when the Roman Pontiff, as supreme pastor, proclaims by definitive act a doctrine of faith or morals.
A 1998 Vatican document on the primacy of Peter’s successor likewise states that the Bishop of Rome possesses a truly episcopal power that is “supreme, full and universal,” and also “immediate” over pastors and faithful.
Orthodoxy rejects that claim. The OCA explicitly says Orthodoxy does not believe in the infallibility of the Pope of Rome “nor of any other individual,” but believes the Church gathered together in council under the Holy Spirit is guided in truth.
Historically, the earliest Dormition and Assumption traditions are complex. They are not found as a narrative in the New Testament. Later apocryphal “Transitus Mariae” traditions develop in various forms. Modern scholarship, such as Stephen Shoemaker’s Oxford study on ancient Dormition and Assumption traditions, argues that some traditions may have roots earlier than once assumed, perhaps even by the third century in some forms, while other narrative families show little evidence of origin earlier than the middle of the fifth century. This supports caution: there is ancient tradition here, but the evidence is not the same kind of evidence one has for doctrines directly defined by Scripture or universally received in the earliest conciliar period.
Therefore, the fairest conclusion is this: the Assumption is a coherent Catholic doctrine within Roman Catholic assumptions about Scripture, Tradition, doctrinal development, and papal authority. It is also closely related to broader Catholic Marian doctrines, especially the Immaculate Conception, which Pius XII explicitly connects to the Assumption.
But from an Orthodox perspective, the problem is not Marian devotion itself. Orthodoxy honors Mary, celebrates her Dormition, and confesses her as Theotokos. The problem is Rome’s 1950 act of dogmatic definition: one bishop defining a doctrine as divinely revealed and binding on the whole Church, without an ecumenical council and without the kind of explicit biblical witness critics would expect for dogma.
In that sense, the Assumption controversy is really a window into the larger Catholic-Orthodox divide. It asks whether the Church’s tradition is guarded through the conciliar life of the whole Church, or whether the Bishop of Rome may definitively define doctrine for the whole Church by virtue of papal office. The debate is not simply about Mary. It is about Scripture, Tradition, ecclesiology, and the limits of doctrinal authority.
Pius XII, Munificentissimus Deus — official Vatican text:
https://www.vatican.va/content/pius-xii/en/apost_constitutions/documents/hf_p-xii_apc_19501101_munificentissimus-deus.html
Catechism of the Catholic Church, 963–975, especially 966 and 974 — official Vatican text:
https://www.vatican.va/content/catechism/en/part_one/section_two/chapter_three/article_9/paragraph_6_mary_-_mother_of_christ%2C_mother_of_the_church.html
Compendium of the Catechism of the Catholic Church, 182, 185 — official Vatican text:
https://www.vatican.va/archive/compendium_ccc/documents/archive_2005_compendium-ccc_en.html
Congregation for the Doctrine of the Faith, “The Primacy of the Successor of Peter in the Mystery of the Church” (1998):
https://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_con_cfaith_doc_19981031_primato-successore-pietro_en.html
Orthodox Church in America, “Dormition of the Theotokos”:
https://www.oca.org/orthodoxy/the-orthodox-faith/worship/the-church-year/dormition-of-the-theotokos
Orthodox Church in America, “Infallibility”:
https://www.oca.org/questions/romancatholicism/infallibility
Stephen J. Shoemaker, Ancient Traditions of the Virgin Mary’s Dormition and Assumption, Oxford University Press, 2002/2003:
https://academic.oup.com/book/27239/chapter/196842985