Theological Reference
Explore the language, councils, theological figures, and Christological questions that stand behind the long dialogue between Eastern Orthodox and Oriental Orthodox Christians.
Section Overview
At the center of the historical division between the Eastern Orthodox and Oriental Orthodox traditions is a shared question: how should Christians speak faithfully about Jesus Christ as fully divine and fully human while confessing him as one Lord and one incarnate Son?
The disagreement that crystallized around the Council of Chalcedon in 451 was not simply a contest between belief and unbelief. It involved theological vocabulary, competing fears about how Christological language could be misunderstood, the authority of councils, ecclesiastical relationships, and the reception of earlier teachers, especially St Cyril of Alexandria. Eastern Orthodox theology receives Chalcedon as the Fourth Ecumenical Council and understands its formula as protecting both the unity of Christ and the integrity of his divinity and humanity. Oriental Orthodox churches receive the first three ecumenical councils and continue to express their Christology through the Cyrillian tradition, particularly the language commonly described today as Miaphysite.
Modern dialogue has made it increasingly important to distinguish terminology from the faith that terminology is intended to safeguard. This section therefore approaches Christology historically and comparatively, giving careful attention to how words such as physis, hypostasis, prosopon, “one nature,” and “two natures” function within their theological settings.
Foundational Questions
Both traditions insist that the incarnation is real: the eternal Word truly became human without ceasing to be divine. The theological challenge is to speak of the distinction between divinity and humanity without dividing Christ into two personal subjects, and to speak of their union without confusing or diminishing either.
In fifth-century debate, identical terms did not always carry identical assumptions. Chalcedonian theology speaks of the one Christ acknowledged in two natures, while the Cyrillian formula favored in Oriental Orthodox tradition speaks of “one incarnate nature of God the Word.” Each formula developed within a specific polemical context and was intended to exclude particular errors.
St Cyril’s defense of the unity of Christ and his role at the Council of Ephesus in 431 are foundational to the Christological inheritance of both families. His writings are therefore indispensable when comparing later formulas and asking whether apparently different expressions can preserve a common confession.
Council of Chalcedon
The Council of Chalcedon met in 451 amid disputes that followed the Council of Ephesus and continuing controversy over the language used to describe Christ. The Chalcedonian Definition confessed one and the same Christ as perfect in divinity and perfect in humanity, with the distinction of the natures preserved in their union. Eastern Orthodox Christianity regards this definition as consistent with the anti-Nestorian theology of St Cyril and as a necessary safeguard against both division and confusion in Christ.
The churches now known as Oriental Orthodox did not receive Chalcedon. Their historical opposition cannot be reduced simply to a denial of Christ’s humanity. The World Council of Churches describes the Oriental Orthodox churches as rooted in the first three ecumenical councils and identifies St Cyril’s teaching as foundational to their Christology. In modern usage, “Miaphysite” is therefore generally more accurate than “Monophysite” when describing their Christological tradition.
For readers of this archive, Chalcedon should be approached not only as a date of separation but also as a theological reference point. Understanding what Chalcedon affirmed, what its opponents feared, and how each tradition interprets Cyril is necessary before evaluating later attempts at reconciliation.
Terminology
The distinction between these terms is important. “Monophysite” has often been used polemically to suggest that Christ possesses only a divine nature or that his humanity is absorbed into divinity. Oriental Orthodox churches reject the teaching associated with Eutyches and do not understand their Christology in that way.
“Miaphysite,” by contrast, is used to describe a Cyrillian way of expressing the unity of the incarnate Word. In this framework, the one incarnate Christ is truly divine and truly human, and the language of one composite or united reality is intended to emphasize that the subject of all Christ’s actions is the one Word incarnate. Modern ecumenical scholarship and dialogue frequently use this distinction because it prevents an inherited label from substituting for a careful examination of what the churches actually confess.
This does not mean that every historical or ecclesiological disagreement disappears once terminology is clarified. It does mean that serious comparison must begin with each tradition’s own theological language rather than assuming that older polemical labels fully describe the other side.
Theological Figures
Cyril is the principal shared patristic reference for the fifth-century Christological controversy. His insistence on the unity of the incarnate Word, his letters surrounding the Council of Ephesus, and his later correspondence provide essential context for both Chalcedonian and Oriental Orthodox interpretations.
Read the historic documentsSeverus became one of the most influential theologians of the non-Chalcedonian tradition. His writings develop a strongly Cyrillian Christology and are especially important for understanding how later Oriental Orthodox theology distinguishes its position from Eutychian interpretations.
Leo’s Tome played a major role at Chalcedon and became an important expression of the Chalcedonian concern to affirm the full reality of Christ’s divinity and humanity. Its reception is central to understanding why the council was viewed differently by the communities that later developed into the two Orthodox families.
Modern Dialogue
Twentieth-century dialogue created a setting in which theologians from both families could compare their inherited formulas directly rather than through centuries of polemical description. Unofficial consultations began in the 1960s, followed by official dialogue in 1985. The resulting discussions examined whether the two traditions had preserved a substantially common faith in the person of Christ despite differences in terminology and conciliar reception.
The First Agreed Statement of 1989 and the Second Agreed Statement of 1990 are central to that process. They are significant because they frame Christological convergence using language intended to respect both traditions. Yet theological convergence and ecclesial communion are not identical questions. Reception by individual churches, the status of councils and anathemas, liturgical and canonical concerns, and the memory of historical figures remain part of the wider discussion.
For that reason, theology on this site is read alongside both the Official Statements and the Historic Documents. The statements show how modern dialogue expresses agreement; the older texts show why the theological vocabulary carries such weight.
Frequently Asked Questions
Short answers to recurring questions about Chalcedon, Miaphysite terminology, and the theological dialogue.
Christology is theological reflection on the person and work of Jesus Christ. In the context of Eastern and Oriental Orthodox dialogue, the central questions concern how Christ’s full divinity and full humanity are united in the one incarnate Son.
The council of 451 confessed one and the same Jesus Christ as truly God and truly human, acknowledged in two natures without confusion, change, division, or separation. Eastern Orthodox churches receive Chalcedon as the Fourth Ecumenical Council.
No. Oriental Orthodox churches reject Eutychianism and confess Christ as truly divine and truly human. Their preferred Cyrillian terminology emphasizes the unity of the incarnate Word and is commonly described as Miaphysite rather than Monophysite.
In contemporary theological usage, Miaphysite refers to the Cyrillian confession of the one incarnate Christ whose divinity and humanity are united without confusion. Monophysite is commonly associated with the idea that only one nature remains in a way that diminishes or absorbs Christ’s humanity, a teaching Oriental Orthodox churches reject.
Both traditions regard Cyril as a major authority on the unity of Christ. His writings provide common ground for evaluating how different fifth-century formulas relate to the same central confession of the incarnate Word.
No. Significant theological convergence has been expressed in modern dialogue, but the Eastern Orthodox and Oriental Orthodox families are not presently in full communion. Ecclesial reception and other canonical, historical, and pastoral questions remain distinct from Christological agreement itself.
Sources & References
These references provide complementary perspectives on Chalcedon, Oriental Orthodox Christology, the Cyrillian tradition, and modern theological dialogue.
Background on the Council of Chalcedon, the incarnation, and the Eastern Orthodox understanding of the council’s Christological definition.
Visit sourceAn overview of the Oriental Orthodox family, its Cyrillian Christological inheritance, and the history of dialogue with Eastern Orthodox churches.
Visit sourceThe Oxford Handbook of Ecumenical Studies surveys major Christological agreements between Chalcedonian and non-Chalcedonian churches.
Visit sourceSt Athanasius College’s Christology unit outlines the Alexandrian and Antiochian schools, Ephesus, Chalcedon, and the modern reconciliation dialogue.
Visit sourceRecent doctoral research compares Christological expression in Coptic and Byzantine liturgical texts and examines how both traditions articulate Christ’s divinity and humanity.
Visit sourceA recent account of renewed meetings between representatives of the Eastern Orthodox and Oriental Orthodox churches and the continuing theological dialogue.
Visit source