
The Eastern Orthodox Church and the Catholic Church have had clear divisions since the Great Schism of 1054, which separated the two churches. The Eastern Orthodox Church considers itself the One, Holy, Orthodox, Catholic, and Apostolic Church established at Pentecost and continuing to the present day. The Orthodox Church has branded Catholic teaching about the papacy as heretical, and the two churches interpret scripture differently. Both churches hold to the four great Church councils of Nicea, Constantinople, Ephesus, and Chalcedon, and they share many fundamental beliefs, such as the Trinity, the deity of Christ, and the resurrection of Jesus.
| Characteristics | Values |
|---|---|
| Date of Division | 1054 |
| Reason for Division | Theological differences |
| Theological Differences | The Orthodox Church considers Catholic teaching about the papacy as "heretical" |
| Eastern Orthodox Christians believe they are the One, Holy, Orthodox, Catholic, Apostolic Church established at Pentecost | |
| Eastern Orthodox Christians believe that only inside their church can a person find the complete truth | |
| Eastern Orthodox Christians believe that only members of their church can be called Christians, although this term can be extended to Catholics and members of the Oriental Church | |
| Eastern Orthodox Christians do not accept the Pope as the Vicar of St Peter | |
| Eastern Orthodox Christians do not interpret the "Petrine texts" in the Gospels in the same way as modern Roman Catholic commentators | |
| Eastern Orthodox Christians do not accept the "filioque clause" | |
| Commonalities | All branches hold the four great Church councils: Nicea, Constantinople, Ephesus and Chalcedon |
| All branches hold truths like the Trinity, the deity of Christ, the resurrection of Jesus and that salvation is found in Christ | |
| All branches affirm the virgin birth, although Catholics and Orthodox Christians normally hold to perpetual virginity, believing that Mary never had intercourse |
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What You'll Learn

The nature of baptism
In Eastern Catholic theology, baptism is considered a sacred mystery that initiates an individual into the life of Christ and the Church. It is seen as a means of grace that forgives original sin, bestows the sanctifying grace of the Holy Spirit, and incorporates the baptised into the Body of Christ. The sacrament is typically administered through a triple immersion, representing the death, burial, and resurrection of Christ. The baptised person is then anointed with sacred chrism, symbolising the sealing of the Holy Spirit and the individual's full incorporation into the Church.
Eastern Catholics recognise a single baptism and do not re-baptise individuals who have validly received the sacrament in other Christian traditions. They emphasise the importance of baptism as the gateway to the other sacraments and the Christian life. The sacrament is usually conferred on infants but can also be administered to adults who have undergone catechumenate, a period of preparation and instruction.
In contrast, Orthodox Christians also view baptism as a sacred mystery that brings about spiritual regeneration and incorporation into the Church. They emphasise the transformative nature of baptism, believing that it washes away sins and bestows divine grace, enabling the baptised to participate in the life of Christ. The Orthodox Church also practices baptism by triple immersion, often in a baptistery or natural body of water, symbolising death to the old life and resurrection to a new life in Christ.
Orthodox Christians similarly recognise the validity of baptisms performed in other Christian traditions and do not re-baptise. They see baptism as a prerequisite for receiving the other sacraments and emphasise the ongoing process of spiritual growth and transformation that begins with baptism and continues throughout the Christian life. The sacrament is typically conferred on infants, who are viewed as members of the Church from birth, but adults who have not been baptised can also receive it after a period of preparation and instruction.
While Eastern Catholics and Orthodox Christians share similarities in their understanding of baptism, there are also subtle differences in their theological nuances and liturgical practices. Both traditions emphasise the sacramental nature of baptism, its role in forgiveness and grace, and its significance as an initiation into the Christian community. However, the specific beliefs and rituals associated with baptism may vary between Eastern Catholic Churches and Orthodox Churches, reflecting their unique historical and theological developments.
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The role of tradition
Eastern Orthodox theologians have branded Catholic teachings about the papacy as "heretical". An encyclical letter issued by the Eastern Patriarchs in 1848 stated that "papism" is a heresy comparable to Arianism, a belief that persists in the Orthodox Church. This disagreement over the role and authority of the Pope, or the "filioque clause", is a key distinction between Eastern and Western Christianity, stemming from the Great Schism of 1054.
Eastern Orthodox Christians hold that their Church is the One, Holy, Orthodox, Catholic, and Apostolic Church established by Christ on Pentecost. They maintain a strict adherence to tradition and understanding of Scripture from the 1st century, believing that only within the Church can one find absolute truth. While they acknowledge Catholics and members of the Oriental Church (Armenians, Copts, etc.) as Christians, they do not extend this recognition to Protestants.
Eastern Catholic theologians, on the other hand, assert that there is a remarkable agreement in focusing on Eucharistic ecclesiology, which they claim is the basis of Orthodox ecclesiology. This school of thought, attributed to Nicolas Afanassief, argues that this understanding of the Church is not new but ancient, and that the Church went off track ecclesiologically in the third century, only to be brought back to its original path by Afanassief and his followers.
Despite these differences in interpretation and emphasis, there are also areas of agreement between Eastern Catholics and Orthodox Christians. Both traditions, for example, hold to the four great Church councils: Nicea, Constantinople, Ephesus, and Chalcedon, and affirm truths such as the Trinity, the deity of Christ, the resurrection of Jesus, and salvation through Christ.
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The Trinity
The Catholic Church and the Eastern Orthodox Church have been in a state of official schism since the East-West Schism of 1054. This schism was caused by historical, linguistic, and theological differences between the Western and Eastern churches. While Eastern Catholics and Roman Catholics share the same core dogmas, they reflect on and express those dogmas differently.
One of the primary theological differences between the two churches is their understanding of the Holy Spirit's procession. The Catholic Church holds that the Holy Spirit proceeds from God the Father to Jesus Christ the Son, while the Eastern Orthodox Church believes that the Holy Spirit proceeds only from God the Father. This difference is known as the Filioque Clause, which refers to the Latin term "filioque" ("and [from] the Son") added to the Niceno-Constantinopolitan Creed, commonly known as the Nicene Creed. The original Greek version of the Creed does not include this term. The Orthodox Church rejects the Filioque Clause as it deliberately changes the words of Christ in John 15:26 and violates the balance of Trinitarian theology.
Another key difference is their understanding of the authority of the Pope. The Catholic Church attributes full, supreme, and universal power to the Pope over the entire Church, while the Eastern Orthodox Church regards the Bishop of Rome as "first among equals" without effective power over other churches. This difference in the understanding of papal primacy has been a primary cause of the schism between the two churches.
Despite these differences, both churches accept the core tenets of the Christian faith, including the Trinity, the deity of Christ, and the resurrection of Jesus.
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The deity of Christ
Eastern Orthodox Christians and Catholics share many similarities, including beliefs about the deity of Christ. Both churches accept the deity of Christ, the Trinity, the resurrection of Jesus, and that salvation is found in Christ. However, there are also differences in their theological perspectives, approaches, and expressions.
Eastern Orthodox Christians and Catholics have different views on the nature of Christ. The Eastern Orthodox Church's theology focuses more on the divinity of Jesus Christ, while the Catholic Church emphasizes his humanity. Eastern Orthodox theology is considered more theoretical, while Catholic theology is influenced by pagan (Neoplatonist and Aristotelian) metaphysical philosophy, and its outgrowth, scholasticism.
One significant difference between the two churches is their understanding of the Holy Spirit's procession. The Catholic Church, including Eastern Catholics, believes in the Filioque Clause, which states that the Holy Spirit proceeds from God the Father and Jesus Christ the Son ("and [from] the Son"). This addition to the Nicene Creed is known as "Filioque" in Latin and is absent in the original Greek version used by the Eastern Orthodox Church. The Eastern Orthodox Church believes that the Holy Spirit proceeds only from God the Father, maintaining the perfect balance of Trinitarian theology.
Eastern Orthodox Christians and Catholics also differ in their understanding of the authority of the Pope. The Catholic Church attributes supreme authority to the Pope, considering him the Vicar of St. Peter, with "full, supreme, and universal power over the whole Church." In contrast, the Eastern Orthodox Church views the Bishop of Rome as "first among equals" (primus inter pares), without effective power over other churches. This difference in the understanding of papal primacy has been a primary cause of the schism between the two churches.
Despite these differences, Eastern Orthodox Christians and Catholics share a common faith in the deity of Christ and other fundamental Christian doctrines. The variations in their theological perspectives and practices do not negate their shared belief in the core tenets of Christianity.
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The virgin birth
Eastern Catholics follow Catholic theology, which includes the doctrine of the virgin birth. This doctrine is a fundamental belief in the Catholic Church, and it states that Mary, the mother of Jesus, was a virgin before and after she gave birth to Jesus Christ.
Luke 1:26-35 recounts the angel Gabriel's words to Mary: "And in the sixth month, the angel Gabriel was sent from God unto a city of Galilee, named Nazareth, to a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name was Mary. And the angel came in unto her and said, 'Hail, thou that art highly favored, the Lord is with thee: blessed art thou among women.' And when she saw him, she was troubled at his saying and cast in her mind what manner of salutation this should be. And the angel said unto her, 'Fear not, Mary, for thou hast found favor with God. And behold, thou shalt conceive in thy womb and bring forth a son, and shalt call his name Jesus. He shall be great and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: and he shall reign over the house of Jacob forever; and of his kingdom there shall be no end.' Then said Mary unto the angel, 'How shall this be, seeing I know not a man?' And the angel answered and said unto her, 'The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.'"
Eastern Catholics, as part of the Catholic Church, uphold the doctrine of the virgin birth as a fundamental tenet of their faith. This belief is shared by their Western Catholic counterparts and is a unifying element within the broader Catholic tradition. While Eastern Catholics and Orthodox Christians may differ on certain theological nuances and practices, their affirmation of the virgin birth demonstrates a common ground in their understanding of Christ's nature and the role of Mary in salvation history. This doctrine continues to be a central aspect of Christian belief and devotion, inspiring theological reflection and artistic representation in various Christian traditions.
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Frequently asked questions
The main difference between Eastern Catholics and Orthodox Christians is that the former follow the Pope as the Vicar of St Peter, whereas the latter do not.
The Eastern Catholic and Orthodox Christian churches were divided by the Great Schism of 1054, which split the original Christian church into two branches: Orthodox and Catholic.
Yes, Eastern Catholics and Orthodox Christians share many beliefs, including the Trinity, the deity of Christ, the resurrection of Jesus, and that salvation is found in Christ. They also hold similar views on the virgin birth and the nature of baptism.
The Eastern Orthodox Church has branded Catholic teaching about the papacy as "heretical". However, it considers Catholics to be Christians, unlike Protestants.
Eastern Catholic theologians are generally unclear about their beliefs regarding the Church. However, they disagree with the interpretation of certain "Petrine texts" in the Gospels by Orthodox theologians.











































