The Christian Church is a term used by some to refer to the whole group of people belonging to the Christian religious tradition throughout history. With "Church" capitalized, the term does not refer to a building. Others believe the term "Christian Church" or "Church" applies only to a specific historic Christian institution (e.g., the Catholic Church, the Eastern Orthodox Church, and Oriental Orthodoxy).
The term Christian Church, in the first understanding, which is generally used by Protestants, does not refer to a particular denomination. However, the majority of Christians belong to groups that consider themselves to be the one true church, to which other Christians do not belong. The three largest such groups are the Catholic Church, the Eastern Orthodox Church, and the Oriental Orthodox communion. Thus, some Christians identify the Christian Church with a visible structure (the view of the Catholic, Eastern Orthodox, and Oriental Orthodox churches) while others (generally Protestants) understand it as an invisible reality not identified with any earthly structure and others equate it with particular groups that share certain essential elements of doctrine and practice though divided on other points of doctrine and government (such as the branch theory as taught by some Anglicans).
The Greek term ἐκκλησία, which is transliterated as "ecclesia", generally meant an "assembly", but in most English translations of the New Testament is usually translated as "church". This term appears in two verses of the Gospel of Matthew, twenty-four verses of the Acts of the Apostles, fifty-eight verses of the Pauline Epistles (including the earliest instances of its use in relation to a Christian body), two verses of the Letter to the Hebrews, one verse of the Epistle of James, three verses of the Third Epistle of John, and nineteen verses of the Book of Revelation. In total, ἐκκλησία appears in the New Testament text 114 times, although not every instance is a technical reference to the church.
In the New Testament, the term ἐκκλησία is used for local communities as well as in a universal sense to mean all believers. Traditionally, only orthodox believers are considered part of the true church, but convictions of what is orthodox have long varied, as many churches (not only the ones officially using the term "Orthodox" in their names) consider themselves to be orthodox and other Christians to be heterodox.
- Etymology 1
- Use by early Christians 2
- Christianity as Roman state religion (380 AD) 3.1
- Great Schism of 1054 3.2
- Protestant Reformation in the 16th century 3.3
Related concepts 4
- Orthodox tradition 4.1
- Catholic tradition 4.2
- Protestant and Anglican traditions 4.3
- Churches of Christ 4.4
- Apostolic succession 4.5
- Visible and invisible church 4.6
- Church government 4.7
- Metaphors 4.8
Divisions and controversies 5
- One universal church 5.1
- Christian denominations 5.2
- Other debates 5.3
- See also 6
- Notes 7
- References 8
- External links 9
The Greek word ekklēsia, literally "called out" or "called forth" and commonly used to indicate a group of individuals called to gather for some function, in particular an assembly of the citizens of a city, as in Acts 19:32-41, is the New Testament term referring to the Christian Church (either a particular local group or the whole body of the faithful). Most Romance and Celtic languages use derivations of this word, either inherited or borrowed from the Latin form ecclesia.
The English language word "church" is from the Old English word cirice, derived from West Germanic *kirika, which in turn comes from the Greek κυριακή kuriakē, meaning "of the Lord" (possessive form of κύριος kurios "ruler" or "lord"). Kuriakē in the sense of "church" is most likely a shortening of κυριακὴ οἰκία kuriakē oikia ("house of the Lord") or ἐκκλησία κυριακή ekklēsia kuriakē ("congregation of the Lord"). Christian churches were sometimes called κυριακόν kuriakon (adjective meaning "of the Lord") in Greek starting in the 4th century, but ekklēsia and βασιλική basilikē were more common.
The word is one of many direct Greek-to-Germanic loans of Christian terminology, via the Goths. The Slavic terms for "church" (Old Church Slavonic црькꙑ [crĭky], Russian церковь [cerkov’], Slovenian cerkev) are via the Old High German cognate chirihha.
Use by early Christians
In using the word ἐκκλησία (ekklēsia, "church"), early Christians were employing a term that, while it designated the assembly of a Greek city-state, in which only citizens could participate, was traditionally used by Greek-speaking Jews to speak of Israel, the people of God, and that appeared in the Septuagint in the sense of an assembly gathered for religious reasons, often for a liturgy; in that translation ἐκκλησία stood for the Hebrew word קהל (qahal), which however it also rendered as συναγωγή (synagōgē, "synagogue"), the two Greek words being largely synonymous until Christians distinguished them more clearly.
The term ἐκκλησία appears in only two verses of the Gospels, in both cases in the Gospel of Matthew. When Jesus says to Simon Peter, "You are Peter, and on this rock I will build my church", the church is the community instituted by Christ, but in the other passage the church is the local community to which one belongs: "If he refuses to listen to them, tell it to the church."
The term is used much more frequently in other parts of the New Testament, designating, as in the Gospel of Matthew, either an individual local community or all of them collectively. Even passages that do not use the term ἐκκλησία may refer to the church with other expressions, as in the first 14 chapters of the Epistle to the Romans, in which ἐκκλησία is totally absent but which repeatedly uses the cognate word κλήτοι (klētoi, "called"). The church may be referred to also through images traditionally employed in the Bible to speak of the people of God, such as the image of the vineyard used particularly in the Gospel of John.
The New Testament never uses the adjectives "catholic" or "universal" with reference to the church, but does indicate that the local communities are one church, that Christians must always seek to be in concord, that the Gospel must extend to the ends of the earth and to all nations, that the church is open to all peoples and must not be divided, etc.
The first recorded application of "catholic" or "universal" to the church is by Ignatius of Antioch in about 107 in his Epistle to the Smyrnaeans, chapter VIII. "Wherever the bishop appears, there let the people be; as wherever Jesus Christ is, there is the Catholic Church." 
The early church originated in Roman Judea in the first century AD, founded on the teachings of Jesus of Nazareth who is believed by Christians to be the Son of God and Christ the Messiah. It is usually thought of as beginning with Jesus' Apostles. According to scripture Jesus commanded them to spread his teachings to all the world.
Springing out of Second Temple Judaism, from Christianity's earliest days, Christians accepted non-Jews (Gentiles) without requiring them to fully adopt Jewish customs (such as circumcision). The parallels in the Jewish faith are the Proselytes, Godfearers, and Noahide Law, see also Biblical law in Christianity. Some think that conflict with Jewish religious authorities quickly led to the expulsion of the Christians from the synagogues in Jerusalem (see also Council of Jamnia and List of events in early Christianity).
The Church gradually spread throughout the Roman Empire and beyond, gaining major establishments in cities such as Jerusalem, Antioch, and Edessa. It also became a widely persecuted religion. It was condemned by the Jewish authorities as a heresy (see also Rejection of Jesus). The Roman authorities persecuted it because, like Judaism, its monotheistic teachings were fundamentally foreign to the polytheistic traditions of the ancient world and a challenge to the imperial cult. The Church grew rapidly until finally legalized and then promoted by Emperors Constantine and Theodosius I in the 4th century as the state church of the Roman Empire.
Already in the 2nd century, Christians denounced teachings that they saw as heresies, especially Gnosticism but also Montanism. Ignatius of Antioch at the beginning of that century and Irenaeus at the end saw union with the bishops as the test of correct Christian faith. After legalization of the Church in the 4th century, the debate between Arianism and Trinitarianism, with the emperors favouring now one side now the other, was a major controversy.
Christianity as Roman state religion (380 AD)
On February 27, 380, the Roman Empire officially adopted the Trinitarian version of Christianity as the state church of the Roman Empire. Prior to this date, Constantius II (337-361) and Valens (364-378) had personally favored Arian or Semi-Arian forms of Christianity, but Valens' successor Theodosius I supported the Trinitarian doctrine as expounded in the Nicene Creed from the 1st Council of Nicea.
On this date, Theodosius I decreed that only the followers of Trinitarian Christianity were entitled to be referred to as Catholic Christians, while all others were to be considered to be heretics, which was considered illegal. In 385, this new legal situation resulted, in the first case of many to come, in the capital punishment of a heretic, namely Priscillian, condemned to death, with several of his followers, by a civil tribunal for the crime of magic. In the centuries of state-sponsored Christianity that followed, pagans and "heretical" Christians were routinely persecuted by the Empire and the many kingdoms and countries that later occupied the place of the Empire, but some Germanic tribes remained Arian well into the Middle Ages (see also Christendom).
The Church within the Roman Empire was organized under metropolitan sees, with five rising to particular prominence and forming the basis for the Pentarchy proposed by Justinian I. Of these five, one was in the West (Rome) and the rest in the East (Constantinople, Jerusalem, Antioch, and Alexandria).
Even after the split of the Roman Empire the Church remained a relatively united institution (apart from Oriental Orthodoxy and some other groups which separated from the rest of the Church earlier). The Church came to be a central and defining institution of the Empire, especially in the East or Byzantine Empire, where Constantinople came to be seen as the center of the Christian world, owing in great part to its economic and political power.
Once the Western Empire fell to Germanic incursions in the 5th century, the (Roman) Church became for centuries the primary link to Roman civilization for medieval Western Europe and an important channel of influence in the West for the Eastern Roman, or Byzantine, emperors. While, in the West, the so-called orthodox Church competed against the Arian Christian and pagan faiths of the Germanic rulers and spread outside what had been the Empire to Ireland, Germany, Scandinavia, and the western Slavs, in the East Christianity spread to the Slavs in what is now Russia, south-central and eastern Europe. The reign of Charlemagne in Western Europe is particularly noted for bringing the last major Western Arian tribes into communion with Rome, in part through conquest and forced conversion.
Starting in the 7th century the Islamic Caliphates rose and gradually began to conquer larger and larger areas of the Christian world. Excepting North Africa and most of Spain, northern and western Europe escaped largely unscathed by Islamic expansion, in great part because richer Constantinople and its empire acted as a magnet for the onslaught. The challenge presented by the Muslims would help to solidify the religious identity of eastern Christians even as it gradually weakened the Eastern Empire. Even in the Muslim World, the Church survived (e.g., the modern Copts, Maronites, and others) albeit at times with great difficulty.
Great Schism of 1054
Although there had long been frictions between the Bishop of Rome (e.g. the patriarch of the Catholic Church proper) and the eastern patriarchs within the Byzantine Empire, Rome's changing allegiance from Constantinople to the Frankish king Charlemagne set the Church on a course towards separation. The political and theological divisions would grow until Rome and the East excommunicated each other in the 11th century, ultimately leading to the division of the Church into the Western (Catholic) and Eastern (Eastern Orthodox) Churches. In 1448, not long before the Byzantine Empire collapsed, the Russian Church gained independence from the Patriarch of Constantinople.
As a result of the redevelopment of Western Europe, and the gradual fall of the Eastern Roman Empire to the Arabs and Turks (helped by warfare against Eastern Christians), the final Fall of Constantinople in 1453 resulted in Eastern scholars fleeing the Moslem hordes bringing ancient manuscripts to the West, which was a factor in the beginning of the period of the Western Renaissance there. Rome was seen by the Western Church as Christianity's heartland. Some Eastern churches even broke with Eastern Orthodoxy and entered into communion with Rome (the "Uniate" Eastern Catholic Churches).
Protestant Reformation in the 16th century
The changes brought on by the Renaissance eventually led to the Protestant Reformation during which the Protestant Lutheran and the Reformed followers of Calvin, Hus, Zwingli, Melancthon, Knox, and others split from the Catholic Church. At this time, a series of non-theological disputes also led to the English Reformation which led to the independence of the Church of England. Then, during the Age of Exploration and the Age of Imperialism, Western Europe spread the Catholic Church and the Protestant and Reformed churches around the world, especially in the Americas. These developments in turn have led to Christianity being the largest religion in the world today.
The terms orthodox church and orthodox faith, with a lower-case O and thus distinguished from the term Orthodox Church, have been used to distinguish the "true church" from heretical groups. The term became especially prominent in referring to the doctrine of the Nicene Creed and, in historical contexts, is often still used to distinguish this first "official" doctrine from others.
The Body of Christ (cf. 1Cor 12:27) and Bride of Christ (cf. Rev 21:9; Eph 5:22-33). These terms are used to refer to the whole community of Christians seen as interdependent in a single entity headed by Jesus Christ.
Visible and invisible Church: On this, see below.
Church Militant and Church Triumphant (Ecclesia Militans, Ecclesia Triumphans). These terms, taken together, are used to express the concept of a united Church that extends beyond the earthly realm into Heaven. The term Church Militant comprises all living Christians while Church Triumphant comprises those in Heaven.
The Church Suffering or Church Expectant: A Catholic concept encompassing those Christians in Purgatory, no longer part of the Church Militant and not yet part of the Church Triumphant.
The "Communion of Saints": This term expresses the idea of a union in faith and prayer that binds all Christians regardless of geographical distance or separation by death. In Catholic theology, it involves the Church Militant, the Church Triumphant, and the Church Suffering.
The Eastern Orthodox Church and Oriental Orthodoxy each claim to be the original Christian Church. The Eastern Orthodox Church bases its claim primarily on its assertion that it holds to traditions and beliefs of the original Christian Church. It also states that four out of the five sees of the Pentarchy (excluding Rome) are still a part of it.
The Oriental Orthodox churches' claims are similar to those of the Eastern Orthodox Church. They never adopted the theory of the Pentarchy, which was formulated later than the break that followed the Council of Chalcedon.
This concept of "orthodoxy" began to take on particular significance during the reign of the Roman Emperor Constantine I, the first to actively promote Christianity. Constantine convened the first Ecumenical Council, the Council of Nicea, which attempted to provide the first universal creed of the Christian faith.
The major issue of this and other councils during the 4th century was the christological debate between Arianism and Trinitarianism. Trinitarianism is the official doctrine of the Catholic Church and is strongly associated with the term "orthodoxy", although some modern non-trinitarian churches dispute this usage.
The Catholic Church teaches in its doctrine that it is the original church founded by Christ on the  Likewise, the encyclical of Pope Pius IX, Singulari Quidem, states in a similar vein, "There is only one true, holy, Catholic Church, which is the Apostolic Roman Church. There is only one See founded on Peter by the word of the Lord... Outside of the Church, no one can hope for life or salvation unless he is excused through ignorance beyond his control." It is also a common theme in Catholic devotional and catechetical literature: "The Holy Catholic and Apostolic Church is the only flock of which Jesus Christ, the Son of God, is the only Shepherd." (Catholic Book of Prayers, Pg. 236, "One Flock, One Shepherd")
A 2007 declaration of the Congregation for the Doctrine of the Faith clarified that, in this passage, "'subsistence' means this perduring, historical continuity and the permanence of all the elements instituted by Christ in the Catholic Church, in which the Church of Christ is concretely found on this earth", and acknowledged that grace can be operative within religious communities separated from the Catholic Church due to some "elements of sanctification and truth" within them, but also added "Nevertheless, the word 'subsists' can only be attributed to the Catholic Church alone precisely because it refers to the mark of unity that we profess in the symbols of the faith (I believe... in the 'one' Church); and this 'one' Church subsists in the Catholic Church."
The Catholic Church teaches that only corporate bodies of Christians led by bishops with valid holy orders can be recognized as "churches" in the proper sense. In Catholic documents, communities without such bishops are formally called ecclesial communities.
Protestant and Anglican traditions
Since the Protestant Reformation, most Protestant denominations interpret "catholic", especially in its creedal context, as referring to the Protestant concept of an eternal, invisible church of Christ and the Elect, and as referenced in the Bible in phrases such as "body of Christ" and "great cloud of witnesses". This Protestant interpretation of the words "one, holy, catholic, and apostolic church" in the Nicene Creed identifies exclusively with the Church Triumphant—the church that exists "in heaven" or in eternity as opposed to the Church Militant—the communion of the faithful here on Earth. They view this understanding of "catholic"—often but not always written with a lower-case "c"—as necessarily distinct from any concrete expression in an institutional church.
Anglicans generally understand their tradition as a branch of the historical Catholic Church and as a via media ("middle way") between traditions. The initial use of the phrase was by John Henry Newman in the 19th century, placing Anglicans as a via media between Rome and Reform - between Catholicism and Protestantism.
Churches of Christ
Churches of Christ are autonomous Christian congregations (see also Christian churches and churches of Christ) associated with one another through common beliefs and practices. They seek to base doctrine and practice on the Bible alone, and seek to be New Testament congregations as originally established by the authority of Christ. Historically, Churches of Christ in the United States were recognized as a distinct movement by the U.S. Religious Census of 1906.
Prior to that they had been reported in the religious census as part of the movement that had its roots in the several independent movements that occurred through the leadership of people such as Thomas Campbell and Alexander Campbell, Walter Scott, and Barton W. Stone. They were active in American frontier settlements and cities. Those leaders had declared their independence from various denominations, seeking a fresh start to restore the New Testament church, and abandoning creeds. The names "Church of Christ", "Christian Church", and "Disciples of Christ" were adopted by the movement because they believed these terms to be biblical.
Modern Churches of Christ have their historical roots in the Restoration Movement, which was a converging of Christians across denominational lines in search of a return to a hypothesized original, "pre-denominational" Christianity. Participants in this movement sought to base doctrine and practice on the Bible alone, rather than recognizing the traditional councils and denominational hierarchies that had come to define Christianity since the 1st century AD. Members of the Churches of Christ believe that Jesus founded only one church, that the current divisions between Christians are not God's will, and that the only basis for restoring Christian unity is the Bible. They typically prefer to be known simply as "Christians", without any further religious or denominational identification. They see themselves as recreating the New Testament church established by Christ.
Church government is congregational rather than denominational. Churches of Christ purposefully have no central headquarters, councils, or other organizational structure above the local church level. Rather, the independent congregations are a network with each congregation participating at its own discretion in various means of service and fellowship with other congregations. This is done so that no congregation polluted by false teachings will bring down the others. The link the churches of Christ share is their shared commitment to restoration principles.
"Apostolic succession" is a doctrine of the Catholic Church, the Eastern Orthodox Churches, the Oriental Orthodox churches, the Anglican Communion, and others. The doctrine asserts that the bishops of the "true Church" enjoy the favor or grace of God as a result of legitimate and unbroken sacramental succession from Jesus' apostles. According to this doctrine, modern bishops, therefore, must be viewed as part of an unbroken line of leadership in succession from the original apostles: though they do not have the authority and powers granted uniquely to the apostles, they are the apostles' successors in governing the Church.
Protestants too see the authority given to the apostles as unique, proper to the apostles alone, to the extent that they generally reject the idea of a succession of bishops to the apostles in governing the Church. Their view of ecclesiastical authority is accordingly different.
Visible and invisible church
Many Protestants believe that the Christian Church, as described in the Bible, has a twofold character that can be described as the visible and invisible church.
In this view, the church invisible consists of all those from every time and place who are vitally united to Christ through regeneration and salvation and who will be eternally united to Jesus Christ in eternal life. The universal, invisible church refers to the "invisible" body of the elect who are known only to God, and contrasts with the "visible church"—that is, the institutional body on earth which preaches the gospel and administers the sacraments. Every member of the invisible church is considered saved, while the visible church contains some individuals who are saved and others who are unsaved. This concept has been attributed to St Augustine of Hippo as part of his refutation of the Donatist sect, but others question whether Augustine really held to some form of an "invisible true Church" concept. Catholics and Eastern Orthodox see this dual ecclesiology as semi-Donatism and a deviation from historic teaching.
The church visible, in this same view, consists of all those who visibly join themselves to a profession of faith and gathering together to know and serve the head of the church, Jesus Christ. It exists globally in all who identify themselves as Christians and locally in particular places where believers gather for the worship of God. The visible church may also refer to an association of particular churches from multiple locations who unite themselves under a common charter and set of governmental principles. The church in the visible sense is often governed by office-bearers carrying titles such as minister, pastor, teacher, elder, and deacon.
For the Catholic Church and the Eastern Orthodox Church, making a real distinction between "the heavenly and invisible Church, alone true and absolute" and "the earthly Church (or rather "the churches"), imperfect and relative" is a "Nestorian ecclesiology" and is thus deemed by both as heretical.
Catholic theology reacted against the Protestant concept of a "purely" invisible church by stressing the visible aspect of the church founded by Christ; but in the 20th century the Catholic Church has placed more stress on the interior life of the church as a supernatural organism. In an encyclical, Pope Pius XII stated that the Catholic Church is the "Mystical Body of Christ". This encyclical rejected two extreme views of the church:
A Holy Spirit:
Although the juridical principles, on which the Church rests and is established, derive from the divine constitution given to it by Christ and contribute to the attaining of its supernatural end, nevertheless that which lifts the Society of Christians far above the whole natural order is the Spirit of our Redeemer who penetrates and fills every part of the Church.
- An exclusively mystical understanding of the Church is mistaken as well, because a mystical "Christ in us" union would deify its members and mean that the acts of Christians are simultaneously the acts of Christ. The theological concept una mystica persona (one mystical person) refers not to an individual relation but to the unity of Christ with the Church and the unity of its members with him in her.
Major forms of church government include episcopal governance (Anglican, Catholic, Eastern Orthodoxy, Oriental Orthodoxy), presbyterian governance, and congregational governance (Baptist, Pentecostal, Congregationalist, charismatic, and other Protestant denominations). Before the Protestant Reformation, church leaders (the bishops) were universally understood to gain their authority through apostolic succession via the Sacrament of Ordination.
Christian scriptures use a wide range of metaphors to describe the Church. These include:
- Family of the Father, the Lord Almighty
- Jesus' family, his mother and brothers, and sisters
- Bride of Christ
- Branches on the vine
- Olive tree
- God's field
- God's building
- Great Sheet
- Spiritual house, a royal priesthood
- Household and temple of God
- City of God, New Jerusalem
- Assembly of the firstborn
- God's house
- Pillar and buttress of the truth
- Body of Christ
- Temple of the Holy Spirit
- Sheep and flock
Divisions and controversies
Today there is a wide diversity of Christian groups, with a variety of different doctrines and traditions. These controversies between the various branches of Christianity naturally include significant differences in their respective ecclesiologies.
One universal church
The phrase "One, holy, catholic, and apostolic Church" appears in the Nicene Creed (μίαν, ἁγίαν, καθολικὴν καὶ ἀποστολικὴν Ἐκκλησίαν) and, in part, in the Apostles' Creed ("the holy catholic church", sanctam Ecclesiam catholicam, which in Greek would be: ἁγίαν καθολικὴν Ἐκκλησίαν). The phrase is intended to set forth the four marks, or identifying signs, of the Christian Church—unity, holiness, universality, and apostolicity—and is based on the premise that all true Christians form a single united group founded by the apostles.
The word "catholic" is derived from the Greek adjective καθολικός pronounced katholikos, which means "general" or "universal". Applied to the Church, it implies a calling to spread the faith throughout the whole world and to all ages. It is also thought of as implying that the Church is endowed with all the means of salvation for its members. In this sense the Church is taken by Christian theology to refer to the single, universal community of faithful. Baptism and communion signifies membership of the Church.
Excommunication is expulsion from the visible community of the Church, and is a remedial denial of the sacraments to a baptized Christian that does not invalidate that Christian's baptism. This can be traced back to the New Testament and to Jesus himself: Matthew 18:15-18, Matthew 16:18-19, Acts 8:18-24, Galatians 1:6-9, 2 Thessalonians 3:6-15, 1 Corinthians 5, 2 Corinthians 2:5-8, 1 Timothy 1:18-20, Titus 3:10, 3 John 9-11, Jude 8-23, John 15:6, 1 Corinthians 5:5.
Saint Ignatius of Antioch, the earliest known writer to use the phrase "the catholic church", excluded from the Church heterodox groups whose teaching and practice conflicted with those of the bishops of the Church, and considered that they were not really Christians. In keeping with this idea, many churches and communions consider that those whom they judge to be in a state of heresy or schism from their church or communion are not part of the catholic Church. This is the view of the Catholic, Oriental Orthodox, and Eastern Orthodox churches.
The Eastern Orthodox Church, the Oriental Orthodox Church, and the Catholic Church each regard themselves as the one true and unique church of Christ, and claim to be not just a Christian church but the original church founded by Christ, preserving unbroken the original teaching and sacraments. The Catholic Church teaches that "the one Church of Christ, as a society constituted and organized in the world, subsists in the Catholic Church, governed by the Successor of Peter and the bishops in communion with him. Only through this Church can one obtain the fullness of the means of salvation since the Lord has entrusted all the blessings of the New Covenant to the apostolic college alone whose head is Peter."
Similarly, the Pentecost." They see the members of other churches as linked in only an imperfect way with the one true Church, recognising Protestants not as churches but as ecclesial or specific faith believing communities.
Many other Christian groups take the view that all denominations are part of a symbolic and global Christian church which is a body bound by a common faith if not a common administration or tradition. Like the Catholic Church, the Orthodox Church, and some others have always referred to themselves as the Catholic church. Oriental Orthodoxy shares this view, seeing the Churches of the Oriental Orthodox communion as constituting the one true Church. In the West the term Catholic has come to be most commonly associated with the Catholic Church because of its size and influence in the West, and because that is historically its name (although in formal contexts most other churches still reject this naming, because the title "Catholic Church" is so linked with the notion of being the one true church).
The Catholic Church and Eastern Orthodox Church believe that the term one in the Nicene Creed describes and prescribes a visible institutional and doctrinal unity, not only geographically throughout the world, but also historically throughout history. They see unity as one of the four marks that the Creed attributes to the genuine Church, and the essence of a mark is to be visible.
A church whose identity and belief varied from country to country and from age to age would not be "one" in their estimation. As such they see themselves not as a denomination, but as pre-denominational; not as one of many faith communities, but the original and sole true Church.
In the New Testament, the word "church" or "assembly"—(translations for ekklesia)—normally refers to believers on earth, and they conclude that the Creed's description "one" must be applicable to the Church on earth and must not be reserved for some eschatological reality. The only exception to the normal New Testament use of the word "ἐκκλησία" is the mention of the "ἐκκλησία of the firstborn who are enrolled in heaven". Even there the Christians to whom the letter is addressed are associated with that heavenly Church ("you have come to…"). In line with this passage, the ancient Churches mentioned see the saints too—that is, the holy dead—as part of the one Church and not as ex-members, so that Christians both in the present life and the afterlife form a single Church.
Many Baptist and Congregationalist theologians accept the local sense as the only valid application of the term church. They strongly reject the notion of a universal (catholic) church. These denominations argue that all uses of the Greek word ekklesia in the New Testament are speaking of either a particular local group or of the notion of "church" in the abstract, and never of a single, worldwide church.
Many Anglicans, Lutherans, Old Catholics, and Independent Catholics view unity as a mark of catholicity, but see the institutional unity of the Catholic Church as manifested in the shared Apostolic Succession of their episcopacies, rather than a shared episcopal hierarchy or rites.
Reformed Christians hold that every person justified by faith in the Gospel committed to the Apostles is a member of "One, holy, catholic, and apostolic Church". From this perspective, the real unity and holiness of the whole church established through the Apostles is yet to be revealed; and meanwhile, the extent and peace of the church on earth is imperfectly realized in a visible way.
The Lutheran Church—Missouri Synod declares that only believers in the doctrine of justification are members of the Christian Church, excluding all others, even if those others are in external communion with the Church and even if they hold a teaching office in it.
Other debates include the following:
- "Churchianity" is a pejorative term for practices of Christianity that are viewed as placing more emphasis on the habits of church life or its institutional traditions than on the teachings of Jesus. Hence the replacement of "Christ" by "Church" in the word "Churchianity". Some Protestants apply it to churches that they view as having moved the central focus from Christ to the Church. Others, such as the Orthodox Church and the Catholic Church, see Christ as the centre, but the Church also as essential (extra Ecclesiam nulla salus) because of the close union between Christ and the Church described in Biblical passages such as the Epistle to the Ephesians (see Bride of Christ), and they view the worship and piety of certain Protestants as centred on celebrity pastors and factions rather than on Christ.
- There are many opinions as to the ultimate fate of the souls of individuals who are not part of a particular institutional church, i.e., members of a particular church may or may not believe that the souls of those outside their church organization can or will be saved.
- There have always been differing opinions as to the divinity of God, the Son, and or his unity with God, the Father. Although historically the most significant debate in this arena was the Arianism and trinitarianism debate in the Roman Empire, debates in this realm have occurred throughout Christian history.
- It has been debated in Protestantism whether or not the Christian Church is in fact a unified heavenly institution with the earthly institutions relegated to secondary status.
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- Liddell and Scott:ἐκκλησία
- "Ekklesia: A Word Study". Acu.edu. Retrieved 3 September 2013.
- McKim, Donald K., Westminster Dictionary of Theological Terms, Westminster John Knox Press, 1996
- The four traditional notes of the Christian Church Google Link
Harper, Douglas (2001). "church". Online Etymology Dictionary. Retrieved 2008-01-18.
O.E. cirice "church," from W.Gmc. *kirika, from Gk. kyriake (oikia) "Lord's (house)," from kyrios "ruler, lord."
Harper, Douglas (2001). "church". Online Etymology Dictionary. Retrieved 2008-01-18.
Gk. kyriakon (adj.) "of the Lord" was used of houses of
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