Catholic Church

Conciliarity is the adherence of various Christian communities to the authority of ecumenical councils and to synodal church governance. It is not to be confused with conciliarism, which is a particular historical movement within the Catholic Church. Different churches interpret conciliarity in different ways.

The World Council of Churches (WCC) is a worldwide Christian inter-church organization founded in 1948 to work for the cause of ecumenism. Its full members today include the Assyrian Church of the East, most jurisdictions of the Eastern Orthodox Church (including the Ecumenical Patriarchate of Constantinople), the Oriental Orthodox Churches, the Union of Utrecht, the Lutheran World Federation, the Anglican Communion, the Mennonite churches, the World Methodist Council, the Baptist World Alliance, the World Communion of Reformed Churches, several Pentecostal churches, the Moravian Church, and the Malankara Mar Thoma Syrian Church. Notably, the Catholic Church is not a full member, although it sends delegates who have observer status to meetings.

The WCC describes itself as "a worldwide fellowship of 352 global, regional and sub-regional, national and local churches seeking unity, a common witness and Christian service". It has no head office as such, but its administrative centre is at the Ecumenical Centre in Geneva, Switzerland. The organization's members include denominations which claim to collectively represent over 600 million people across the world in more than 110 countries.

Dyophysitism (/daɪˈɒfɪsaɪtɪzəm/; from Greek δύο dyo, "two" and φύσις physis, "nature") is the Christological position that Jesus Christ is in two distinct, inseparable natures: divine and human. It is accepted by the majority of Christian denominations, including the Catholic Church, Eastern Orthodox Church, Church of the East, Anglicanism, Methodism, Reformed Christianity and Lutheranism. It is rejected by the Oriental Orthodox churches, who hold to Miaphysitism—that Jesus Christ is of two natures united into one composite nature—while rejecting Monophysitism as heresy along with other extant denominations.

Those who subscribe to the "two natures after the union" formula on either Chalcedonian and Nestorian side were referred to as dyophysites (/daɪˈɒfəsaɪts/). It is related to the doctrine of the hypostatic union and prosopic union.

Mary was a first-century Jewish woman of Nazareth, the wife of Joseph and the mother of Jesus. She is an important figure of Christianity, venerated under various titles such as virgin or queen, many of them mentioned in the Litany of Loreto. The Eastern and Oriental Orthodox, Catholic, Evangelical Lutheran, Reformed, Anglican, Methodist and Baptist churches believe that Mary, as mother of Jesus, is the Mother of God. The Church of the East historically regarded her as Christotokos, a term still used in Assyrian Church of the East liturgy. She has the highest position in Islam among all women and is mentioned numerous times in the Quran, including in a chapter named after her. She is also revered in the Baháʼí Faith and the Druze Faith.

The synoptic Gospels name Mary as the mother of Jesus. The gospels of Matthew and Luke describe Mary as a virgin who was chosen by God to conceive Jesus through the Holy Spirit. After giving birth to Jesus in Bethlehem, she and her husband Joseph raised him in the city of Nazareth in Galilee, and she was in Jerusalem at his crucifixion and with the apostles after his ascension. Although her later life is not accounted in the Bible; Catholic, Eastern Orthodox, and some Protestant traditions believe that her body was raised into heaven at the end of her earthly life, which is known in Western Christianity as the Assumption of Mary and in Eastern Christianity as the Dormition of the Mother of God.

Saint Peter (born Shimon bar Yonah; 1 BC – AD 64/68), also known as Peter the Apostle, Simon Peter, Simeon, Simon, or Cephas, was one of the Twelve Apostles of Jesus and one of the first leaders of the early Christian Church. He appears repeatedly and prominently in all four New Testament gospels, as well as the Acts of the Apostles. Catholic and Orthodox tradition treats Peter as the first bishop of Rome – or pope – and also as the first bishop of Antioch. According to Christian tradition, Peter was crucified in Rome under Emperor Nero.

The ancient Christian churches venerate Peter as a major saint and the founder of the Church of Antioch and the Church of Rome, but they differ in their attitudes regarding the authority of his successors. According to Catholic teaching, Jesus promised Peter a special position in the Church. In the New Testament, the name "Simon Peter" is found 19 times. He is the brother of Andrew, and they both were fishermen. The Gospel of Mark, in particular, is traditionally thought to show the influence of Peter's preaching and eyewitness accounts. He is also mentioned as Peter or Cephas in Paul's First Letter to the Corinthians and the Epistle to the Galatians. The New Testament also includes two general epistles, First Peter and Second Peter, which are traditionally attributed to him, but modern scholarship generally rejects the Petrine authorship of both.

Lazarus of Bethany is a figure of the New Testament whose life is restored by Jesus four days after his death, as told in the Gospel of John. The resurrection is considered one of the miracles of Jesus. In the Eastern Orthodox Church, Lazarus is venerated as Righteous Lazarus, the Four-Days Dead. The Eastern Orthodox and Catholic traditions offer varying accounts of the later events of his life.

In the context of the seven signs in the Gospel of John, the raising of Lazarus at Bethany – today the town of Al-Eizariya in the West Bank, Palestine, which translates to "the place of Lazarus" – is the climactic narrative: exemplifying the power of Jesus "over the last and most irresistible enemy of humanity: death. For this reason, it is given a prominent place in the gospel."

Aspersion (la. aspergere/aspersio), in a religious context, is the act of sprinkling with water, especially holy water. Aspersion is a method used in baptism as an alternative to immersion or affusion. The word is formed of the Latin aspergere, 'to sprinkle', of ad, 'to', and spargo, 'I scatter' (Ezekiel 36:25–26, 1 Corinthians 10:2, cf. Psalm 77:16-20).

In addition, aspersion is performed as part of certain rites to remind people of their baptism, such as the renewal of baptismal vows performed by the Catholic Church and Lutheran Church at Easter.

Affusion is a method of baptism where water is poured on the head of the person being baptized. The word "affusion" comes from the Latin affusio, meaning "to pour on". Affusion is one of four methods of baptism used by Christians, which also include total or partial immersion baptism and aspersion or sprinkling.

Christian denominations which baptize by affusion do not deny the legitimacy of baptizing by submersion or immersion; rather, they consider that affusion is a sufficient, if not necessarily preferable, method of baptism. Affusion and aspersion tend to be practiced by Christian denominations that also practice infant baptism. This may be due to the practical difficulties and dangers of drowning and hypothermia associated with totally immersing an infant in cold water. However, most Eastern Christians (e.g. Eastern Orthodox) and some Catholics practice infant immersion. Amish, Old Order Mennonites, and Conservative Mennonites still practice baptism by pouring.

Infant baptism, also known as christening or paedobaptism, is a Christian sacramental practice of baptizing infants and young children. Such practice is done in the Catholic Church, the Eastern Orthodox and Oriental Orthodox churches, various Protestant denominations, and also in other denominations of Christianity. The practice involves baptizing infants born to believing parents as a means of initiating them into the Christian faith. Supporters of infant baptism cite biblical references to the baptism of entire households in the New Testament, as well as Jesus' teachings on welcoming children, as justification for this approach.

In contrast, believers' baptism (credobaptism) is based on the premise that baptism should be administered only to individuals who can personally profess their faith. Those who support this view argue that baptism is a conscious act of commitment to Christianity, requiring an understanding of its significance. As a result, they maintain that only those capable of articulating their belief should participate in the sacrament. This perspective is commonly held by Anabaptists, Baptists, Pentecostals, and other evangelical groups. Proponents of believers’ baptism argue that the absence of explicit references to infant baptism in the New Testament, along with the significance of baptism as a personal commitment.

Lutheranism or Evangelical Lutheranism is a major branch of Protestantism that emerged under the work of Martin Luther, the 16th-century German friar and reformer whose efforts to reform the theology and practices of the Catholic Church launched the Reformation in 1517. The Lutheran Churches adhere to the Bible and the Ecumenical Creeds, with Lutheran doctrine being explicated in the Book of Concord. Lutherans hold themselves to be in continuity with the apostolic church and affirm the writings of the Church Fathers and the first four ecumenical councils.

The schism between Roman Catholicism and Lutheranism, which was formalized in the Edict of Worms of 1521, centered on two points: the proper source of authority in the church, often called the formal principle of the Reformation, and the doctrine of justification, the material principle of Lutheran theology. Lutheranism advocates a doctrine of justification "by Grace alone through faith alone on the basis of Scripture alone", the doctrine that scripture is the final authority on all matters of faith. This contrasts with the belief of the Roman Catholic Church, defined at the Council of Trent, which contends that final authority comes from both Scripture and tradition. In Lutheranism, tradition is subordinate to Scripture and is cherished for its role in the proclamation of the Gospel.