What Separates Eastern Orthodoxy, Catholicism, Protestantism, and Oriental Orthodoxy?
The post presents the first episode of "Understanding Orthodoxy," an educational series from Prayer Orthodoxy. It outlines the historical and theological differences among Eastern Orthodoxy, Roman Catholicism, Protestantism, and Oriental Orthodoxy. All four traditions trace their origins to Jesus Christ and the apostles, confess the Trinity, and accept the authority of Scripture, but their biblical canons differ: Protestants generally use 66 books, Roman Catholics 73 including the Deuterocanon, Eastern Orthodox a broader Old Testament based on the Septuagint, and Oriental Orthodox canons vary, with the Ethiopian Orthodox Tewahedo Church recognizing 81 books.
Eastern Orthodoxy understands itself as preserving the fullness of apostolic faith and Tradition through conciliar governance, with the Ecumenical Patriarch as first among equals, and centers worship on the Divine Liturgy and theosis. Roman Catholicism shares the first millennium heritage but teaches papal universal jurisdiction and infallibility, the Filioque clause, purgatory, and the Immaculate Conception, which Orthodoxy views as lacking early consensus.
Protestantism began with the 16th-century Reformation, emphasizing sola Scriptura and justification by faith, though traditions vary widely in sacramental theology and governance. Oriental Orthodoxy comprises six ancient church families that rejected the Council of Chalcedon in 451, following St. Cyril's miaphysite formula of one incarnate nature; modern dialogues have found substantial Christological agreement, but full communion has not been restored.
The episode concludes that Eastern Orthodoxy sees itself as the continuous historical and spiritual expression of the One, Holy, Catholic, and Apostolic Church.
Main points
- All four traditions share apostolic roots and Trinitarian faith but differ in biblical canon, authority, and governance.
- Eastern Orthodoxy emphasizes conciliar governance, theosis, and preservation of apostolic Tradition without universal papal jurisdiction.
- Roman Catholicism teaches papal supremacy, infallibility, and doctrines like Filioque, purgatory, and the Immaculate Conception.
- Protestantism originates from the 16th-century Reformation, emphasizing sola Scriptura and justification by faith, with diverse sacramental views.
- Oriental Orthodoxy rejects Chalcedon, follows miaphysite Christology, and modern dialogues show substantial agreement but communion remains unresolved.