The Orthodox Church

The Orthodox Church confesses one God in three Persons (Father, Son, Holy Spirit). The Nicene Creed (without the Western filioque addition) is the principal articulation. The Trinitarian formula governs the sign of the cross (made from right shoulder to left, opposite the Western direction), the baptismal formula, and all principal blessings. Orthodox theology distinguishes God's essence (unknowable in itself) from God's energies (knowable, the means by which God acts in the world), a distinction articulated especially by Saint Gregory Palamas in the 14th century.

Christ is true God and true man, one Person in two natures (the Chalcedonian definition, 451 AD). Orthodox Christology emphasizes the Incarnation as the central salvific event, Christ became human so that humans might become god by grace (theosis). The Orthodox understanding of salvation centers on this participation in the divine life rather than on the juridical / forensic framework of Western soteriology.

Orthodox teaching holds Holy Scripture as the principal written witness to the Apostolic Tradition, with both interpreted within the living Tradition of the Church (capital T, the Tradition is the life of the Holy Spirit in the Church). The Orthodox biblical canon includes the deuterocanonical books, similar to but not identical with the Catholic canon (with some additional texts in particular Orthodox traditions, e.g., 3 Maccabees, Prayer of Manasseh). The Septuagint (the Greek Old Testament) is the principal Orthodox Old Testament text; the Slavonic and various national-language Bibles translate from the Septuagint rather than the Hebrew Masoretic text.

Orthodox theology speaks of seven Holy Mysteries (the Orthodox term, parallel to but not identical with the Catholic "sacraments"): Baptism, Chrismation (administered immediately after Baptism, parallel to but distinct from Western Confirmation), Eucharist, Confession, Anointing of the Sick, Marriage, and Ordination. The Mysteries are the means by which God's grace is communicated; Orthodox sacramental theology shares much with Catholic teaching but in distinct theological idiom.

Orthodox Christianity carries substantial veneration of Mary (the Theotokos, "God-bearer") and the saints. Icons of Christ, Mary, and the saints are venerated (proskynesis), not worshipped (latria, reserved to God alone). The Seventh Ecumenical Council (Nicaea II, 787 AD) defended the veneration of icons against the Iconoclast controversy. Icons in Orthodox practice are theological windows: they make present the persons depicted in a real way, distinct from devotional art in Western Christianity.

Theosis (deification, divinization) is the principal Orthodox teaching about the goal of the Christian life: the human person participates in the divine nature by grace, becoming (in the formulations of the Fathers) "god by grace" while remaining a creature. Saint Athanasius's phrase "God became man so that man might become god" articulates the doctrine. Theosis is worked through the sacramental life, ascetic practice, prayer, and the cultivation of the virtues.

The Divine Liturgy of Saint John Chrysostom is the principal Sunday Eucharistic service in most Orthodox jurisdictions. The Divine Liturgy of Saint Basil the Great is celebrated ten times a year (the five Sundays of Lent, Holy Thursday, Holy Saturday, the eves of Christmas and Epiphany, and Saint Basil's feast day). The Presanctified Liturgy is celebrated during weekdays of Lent. The Divine Liturgy runs typically 90 minutes to two hours and is celebrated in the liturgical language of the jurisdiction (Greek, Church Slavonic, Arabic, English in pan-Orthodox parishes).

An Orthodox life passage: infant Baptism by triple immersion with Chrismation immediately following (typically within the first months of life), reception of the Eucharist from baptism onward (no distinct "First Communion"), Marriage by the Crowning service, and (where applicable) Ordination. Confession is normally practiced before each reception of Communion in some traditions; less frequently in others. Anointing of the Sick is administered at serious illness; the Holy Unction service on Holy Wednesday of Holy Week is offered to all the faithful.

The Orthodox liturgical year follows the same Christmas-Epiphany-Lent-Easter rhythm as Western Christianity but with substantial differences in date. Easter (Pascha) is calculated differently and falls between one and five weeks later than Western Easter (sometimes coinciding). The Twelve Great Feasts structure the year: Nativity of the Theotokos, Exaltation of the Cross, Entrance of the Theotokos, Nativity of Christ, Theophany, Meeting of the Lord, Annunciation, Entrance into Jerusalem, Ascension, Pentecost, Transfiguration, Dormition of the Theotokos. Fasting periods (Great Lent, Apostles Fast, Dormition Fast, Nativity Fast) shape the rhythm substantially.

Orthodox daily prayer includes morning prayers, evening prayers, and grace at meals. The fuller daily cycle (Vespers, Compline, Midnight Office, Matins, the Hours) is observed in monasteries and to varying degrees by lay Orthodox households. The Jesus Prayer ("Lord Jesus Christ, Son of God, have mercy on me, a sinner") is the principal Orthodox prayer practice, often prayed with a prayer rope (chotki / komboskini) of 33, 50, 100, or 300 knots. Many Orthodox households maintain an icon corner with morning and evening prayer before the icons.

Orthodox fasting practice is substantial and shapes the year. The four major fasts: Great Lent (40 days plus Holy Week before Pascha), Apostles Fast (variable, from Pentecost to June 29), Dormition Fast (August 1-14), Nativity Fast (November 15 to December 24). Wednesdays and Fridays are also normally fasting days. The fast is principally a fast from animal products (meat, dairy, eggs, fish on most days; wine and oil are also fasted on stricter days). Ascetic practice is theologically in Orthodox teaching; the call to ascetic disciplines is universal, not monastic-only.

Orthodox church architecture is distinctive: the iconostasis (a wall of icons separating the nave from the altar), the dome with the Pantokrator icon at its center, the cruciform floorplan in many traditions. Icons line the walls and stand on the icon stands; the faithful venerate them (kissing the icon, lighting candles before them, bowing). Iconography follows traditional Byzantine canons in most Orthodox jurisdictions; modern Russian and Greek iconography retains these patterns. Each icon has a specific theological function within Orthodox spirituality.

Orthodox Christianity does not have a single visible head. Instead, fifteen or sixteen autocephalous churches (self-governing) are in full communion with one another, each headed by its own patriarch or archbishop. The principal autocephalous churches in US presence: the Greek Orthodox Archdiocese of America (under the Ecumenical Patriarchate of Constantinople); the Orthodox Church in America (OCA, granted autocephaly in 1970 by Moscow but with a complicated international recognition); the Russian Orthodox Church Outside of Russia (ROCOR, since 2007 in formal union with the Moscow Patriarchate); the Antiochian Orthodox Christian Archdiocese; the Serbian Orthodox Church; the Romanian Orthodox Episcopate; the Bulgarian, Ukrainian, Georgian, and other smaller jurisdictions. The Ecumenical Patriarch of Constantinople is "first among equals" but does not exercise jurisdictional authority over the other patriarchs.

A historical distinction worth understanding: the Eastern Orthodox Churches (Greek, Russian, Antiochian, etc.) and the Oriental Orthodox Churches (Coptic, Armenian, Ethiopian, Eritrean, Syriac, Indian Malankara) separated at the Council of Chalcedon in 451 over Christological language. The Oriental Orthodox are sometimes called "non-Chalcedonian" or (historically and now widely contested) "monophysite," though most Oriental Orthodox theologians prefer "miaphysite" and consider the Christological dispute substantially resolved in modern ecumenical dialogue. The two families are not in full communion but have substantial doctrinal agreement; this page primarily addresses the Eastern Orthodox tradition, with Oriental Orthodox communities named where they appear in US Christian life (substantial Coptic, Armenian, and Ethiopian communities in major US cities).

A major internal division. The historic Christian calendar is the Julian calendar, drifted from astronomical accuracy by about thirteen days from the Gregorian calendar. Some Orthodox jurisdictions adopted the Revised Julian Calendar in 1923 (the Greek Orthodox Archdiocese, most of the Antiochian, the OCA, and others); others retained the Julian / Old Calendar (the Russian Orthodox Church inside Russia, the Serbian, the Georgian, the Jerusalem Patriarchate, Mount Athos, and Old Calendarist communities). The result: Christmas on December 25 (Revised Julian / New Calendar) or January 7 (Old Calendar). Pascha is calculated by a separate (Julian-based) rule across all canonical Orthodox jurisdictions, so the Easter date is universal across Orthodox practice.

US Orthodox Christianity is substantially shaped by the relationship between cradle Orthodox (those born into Orthodox families, often of Greek, Russian, Antiochian, Serbian, Eastern European, or Middle Eastern heritage) and convert Orthodox (those who have converted from other Christian traditions, principally Protestant and Catholic). The convert phenomenon is substantial in US Orthodoxy, with some parishes (especially Antiochian and OCA parishes) heavily convert-attended. The two communities sometimes hold different emphases on liturgical practice, fasting rigor, and engagement with broader US Christianity; both are within canonical Orthodoxy.

Orthodox priests may be either married (married before ordination) or monastic (celibate, drawn from the monasteries). The bishops are drawn from the monastic clergy. A married priest cannot become a bishop in normal Orthodox practice; widowed clergy may enter monasticism and become bishops. This is the principal structural difference from the Catholic Latin-Rite clergy (universally celibate by the time of priesthood). The Orthodox arrangement preserves the early Christian pattern documented in the Pastoral Epistles; many Eastern Catholic Churches retain the same arrangement.

Orthodox monasticism is theologically and spiritually central to the tradition in ways that surface in lay practice. Mount Athos (the Holy Mountain) in Greece, with its twenty principal monasteries and substantial monastic population, is the spiritual heart of Eastern Orthodox monasticism. The Optina Hermitage and other Russian monasteries similarly shape Russian Orthodox spiritual life. The hesychast tradition (the practice of the Jesus Prayer and inner stillness) carries the contemplative spirituality of Orthodoxy. US Orthodox monasticism is smaller in scale but exists in various locations; lay Orthodox spirituality is shaped substantially by monastic spiritual writers (the Philokalia, Saint John Climacus, Saint Isaac the Syrian, more recent figures like Elder Sophrony and Father Seraphim Rose).

The principal doctrinal disagreement between Catholic and Orthodox Christianity: the filioque, the Western addition to the Nicene Creed asserting that the Holy Spirit proceeds "from the Father and the Son" (filioque) rather than "from the Father" alone. Orthodox teaching rejects the addition both as theologically problematic (asserting two principles within the Trinity) and as a unilateral Western innovation. The other principal disputes: papal primacy (Orthodox accepts the Bishop of Rome as first among equals among the patriarchs but rejects universal jurisdiction and infallibility), the Immaculate Conception (Orthodox honors Mary substantially but does not hold the specific 1854 Catholic dogma), and purgatory (Orthodox affirms a process of purification after death but does not articulate it as the Western purgatorial doctrine). The Great Schism formalized in 1054 and has not been healed; mutual excommunications were lifted in 1965 but full communion has not been restored.

Beyond the canonical jurisdictions, smaller "Old Calendarist" groups separated from their parent churches when the Revised Julian Calendar was adopted in 1923. The Old Calendarist Greeks, the Russian Catacomb Church, and similar groups consider the calendar change a violation of canonical tradition and have remained outside of communion with the canonical jurisdictions that adopted it. The canonical jurisdictions hold these as schismatic; the Old Calendarists hold the canonical jurisdictions as having compromised. This is a small but persistent internal dispute.

Orthodox teaching reserves the priesthood and episcopate to men. The deaconess order (a documented order in the early Church, with substantial documentation in Byzantine practice) is a subject of contemporary Orthodox theological discussion; the Patriarchate of Alexandria reinstituted the female diaconate in a limited form in 2017. Women serve in many liturgical and lay capacities (chanters, choir directors, parish administrators, monastic life, theologians and seminary professors); the diaconate question remains under discussion across the Orthodox world.

Orthodox teaching holds that marriage is between one man and one woman and that homosexual acts are inconsistent with Orthodox sexual ethics. The pastoral approach varies across Orthodox jurisdictions and parishes; some clergy emphasize accompaniment and the universal call to chastity, others emphasize the teaching's strictness. The Orthodox Church has not undergone the substantial public divisions over LGBTQ+ inclusion that have shaped Anglican and Mainline Protestant practice; the teaching is uniform across canonical Orthodox jurisdictions.

A contemporary inter-Orthodox dispute: the Ecumenical Patriarchate of Constantinople granted autocephaly to the Orthodox Church of Ukraine in 2019, which the Moscow Patriarchate did not recognize. The Moscow Patriarchate broke communion with Constantinople over the question; several other Orthodox patriarchates have aligned with one side or the other. The dispute concerns the limits of the Ecumenical Patriarch's authority to grant autocephaly and the canonical territory of the Moscow Patriarchate. This is an active and contested ecclesiological question with substantial implications for US Orthodox jurisdictional relationships.

Some convert Orthodox communities have developed reputations for political conservatism, rigorous traditionalism, or distinctive engagement with US culture wars. This is a contested observation within US Orthodoxy itself: some convert Orthodox communities are politically and culturally conservative, others are not; some cradle Orthodox communities are quite traditional, others are highly assimilated to US Mainline Protestant culture. The relationship between Orthodox theological commitments and contemporary US political alignments is not uniform; the page notes the observation without ascribing it to Orthodoxy as such.