Apostolic succession is the method whereby the ministry of the Christian Church is considered by some Christian denominations to be derived from the apostles by a continuous succession, which has usually been associated with a claim that the succession is through a series of bishops. Those of the Anglican, Church of the East, Eastern Orthodox, Hussite, Moravian, Old Catholic, Oriental Orthodox, Catholic and Scandinavian Lutheran traditions maintain that "a bishop cannot have regular or valid orders unless he has been consecrated in this apostolic succession". These traditions do not always consider the episcopal consecrations of all of the other traditions as valid.
Sola scriptura is a Christian theological doctrine held by most Protestant Christian denominations, in particular the Lutheran and Reformed traditions, that posits the Bible as the sole infallible source of authority for Christian faith and practice. The Catholic Church considers it heterodox and generally the Orthodox churches consider it to be contrary to the phronema of the Church.
The five solae of the Protestant Reformation are a foundational set of Christian theological principles held by theologians and clergy to be central to the doctrines of justification and salvation as taught by the Calvinism and Lutheranism branches of Protestantism, as well as in some branches of Pentecostalism. Each sola represents a key belief in these Protestant traditions that is distinct from the theological doctrine of the Catholic Church, although they were not assembled as a theological unit until the 20th century. The Reformers are known to have only clearly stated two of the five solae. Even today there are differences as to what constitutes the solae, how many there are, and how to interpret them to reflect the Reformers' beliefs.
The following outline is provided as an overview of and topical guide to Christian theology:
Christian tradition is a collection of traditions consisting of practices or beliefs associated with Christianity. These ecclesiastical traditions have more or less authority based on the nature of the practices or beliefs and on the group in question. Many churches have traditional practices, such as particular patterns of worship or rites, that developed over time. Deviations from such patterns are sometimes considered unacceptable by followers or are regarded as heretical. There are certain Christian traditions that are practiced throughout the liturgical year, such as praying a daily devotional during Advent, erecting a nativity scene during Christmastide, chalking the door on Epiphany Day, fasting during Lent, waving palms on Palm Sunday, eating easter eggs during Eastertide, and decorating the church in red on Pentecost.
Formal principle and material principle are two categories in Christian theology to identify and distinguish the authoritative source of theology from the theology itself, especially the central doctrine of that theology, of a religion, religious movement, tradition, body, denomination, or organization. A formal principle tends to be texts or revered leaders of the religion, while a material principle is its central teaching. Paul Tillich believed the identification and application of this pair of categories in theological thinking to have originated in the 19th century. As early as 1845 the Protestant theologian and historian Philip Schaff discussed them in his The Principle of Protestantism. They were utilized by the Lutheran scholar F. E. Mayer in his The Religious Bodies of America in order to facilitate a comparative study of the faith and practice of Christian denominations in the United States. This is also treated in a theological pamphlet entitled Gospel and Scripture by the Commission on Theology and Church Relations of the Lutheran Church—Missouri Synod.
The infallibility of the Church is the belief that the Holy Spirit preserves the Christian Church from errors that would contradict its essential doctrines. It is related to, but not the same as, indefectibility, that is, "she remains and will remain the Institution of Salvation, founded by Christ, until the end of the world." The doctrine of infallibility is premised on the authority Jesus granted to the apostles to "bind and loose" and in particular the promises to Peter in regard to papal infallibility.
In Christian communities, Bible study is the study of the Bible by people as a personal religious or spiritual practice. In many Christian traditions, Bible study, coupled with Christian prayer, is known as doing devotions or devotional acts. Many Christian churches schedule time to engage in Bible study collectively. The origin of Bible study groups has its origin in early Christianity, when Church Fathers such as Origen and Jerome taught the Bible extensively to disciple Christians. In Christianity, Bible study has the purpose of "be[ing] taught and nourished by the Word of God" and "being formed and animated by the inspirational power conveyed by Scripture".
Prima scriptura is the Christian doctrine that canonized scripture is "first" or "above all" other sources of divine revelation. Implicitly, this view suggests that, besides canonical scripture, there can be other guides for what a believer should believe and how they should live, such as the Holy Spirit, created order, traditions, charismatic gifts, mystical insight, angelic visitations, conscience, common sense, the views of experts, the spirit of the times or something else. Prima scriptura suggests that ways of knowing or understanding God and his will that do not originate from canonized scripture are perhaps helpful in interpreting that scripture, but testable by the canon and correctable by it, if they seem to contradict the scriptures. Prima sciptura is upheld by the Anglican, Methodist and Pentecostal traditions of Christianity, which suggest that Scripture is the primary source for Christian doctrine, but that "tradition, experience, and reason" can nurture the Christian religion as long as they are in harmony with the Bible.
The rule of faith is the name given to the ultimate authority in Christian belief or fundamental hermeneutic (interpretive) standard. It was used by Early Christian writers such as Tertullian. The phrase is sometimes used for early creeds.
Bibliology, also known as the Doctrine of Scripture, is a branch of systematic theology that deals with the nature, character, and authority of the Bible.
Catholicity is a concept of pertaining to beliefs and practices that are widely accepted by numerous Christian denominations, most notably by those Christian denominations that describe themselves as catholic in accordance with the Four Marks of the Church, as expressed in the Nicene Creed formulated at the First Council of Constantinople in 381: "[I believe] in one, holy, catholic, and apostolic Church." The English adjective catholic is derived from the Ancient Greek adjective καθολικός, meaning "general", "universal". Thus, "catholic" means that in the Church the wholeness of the Christian faith, full and complete, all-embracing, and with nothing lacking, is proclaimed to all people without excluding any part of the faith or any class or group of people. An early definition for what is "catholic" was summarized in what is known as the Vincentian Canon in the 5th century Commonitory: "what has been believed everywhere, always, and by all."
Lex orandi, lex credendi, sometimes expanded as Lex orandi, lex credendi, lex vivendi, is a motto in Christian tradition, which means that prayer and belief are integral to each other and that liturgy is not distinct from theology. It refers to the relationship between worship and belief. As an ancient Christian principle it provided a measure for developing the ancient Christian creeds, the canon of scripture, and other doctrinal matters. It is based on the prayer texts of the Church, that is, the Church's liturgy. In the Early Church, there was liturgical tradition before there was a common creed, and before there was an officially sanctioned biblical canon. These liturgical traditions provided the theological framework for establishing the creeds and canon.
The Four Marks of the Church, also known as the Attributes of the Church, describes four distinctive adjectives of traditional Christian ecclesiology as expressed in the Nicene Creed completed at the First Council of Constantinople in AD 381: "[We believe] in one, holy, catholic, and apostolic Church."
In Christianity, the term biblical authority refers to two complementary ideas:
A dogma of the Catholic Church is defined as "a truth revealed by God, which the magisterium of the Church declared as binding". The Catechism of the Catholic Church states:
The Church's Magisterium asserts that it exercises the authority it holds from Christ to the fullest extent when it defines dogmas, that is, when it proposes, in a form obliging Catholics to an irrevocable adherence of faith, truths contained in divine Revelation or also when it proposes, in a definitive way, truths having a necessary connection with these.
The doctrine of the clarity of Scripture is a Protestant Christian position teaching that "...those things which are necessary to be known, believed, and observed, for salvation, are so clearly propounded and opened in some place of Scripture or other, that not only the learned, but the unlearned, in a due use of the ordinary means, may attain unto a sufficient understanding of them". Clarity of scripture is an important doctrinal and Biblical interpretive principle for historical Protestants and, today, for many evangelical Christians; it is adhered to by the Lutheran, Reformed, Anglican and Methodist churches. Perspicuity of scripture does not imply that people will receive it for what it is, as many adherents to the doctrine of perspicuity of scripture accept the Calvinist teaching that man is depraved and needs the illumination of the Holy Spirit in order to see the meaning for what it is. Martin Luther advocated the clearness of scripture in his work On the Bondage of the Will. Arminius argued for the perspicuity of scripture by name in "The Perspicuity of the Scriptures".
The deposit of faith is the body of revealed truth in the scriptures and sacred tradition proposed by the Roman Catholic Church for the belief of the faithful. The phrase has a similar use in the U.S. Episcopal Church for their own belief.
Criticism of Protestantism covers critiques and questions raised about Protestantism, the Christian denominations which arose out of the Protestant Reformation. While critics may praise some aspects of Protestantism which are not unique to the various forms of Protestantism, Protestantism is faced with criticism mainly from the Catholic Church and the Eastern Orthodox Church, although Protestant denominations have also engaged in self-critique and criticized one another. According to both the Catholic Church and Eastern Orthodoxy, many major, foundational Protestant doctrines have been officially declared heretical.
Catholic–Protestant relations refers to the social, political and theological relations and dialogue between the Catholics and Protestants.
