Christian theology is summarized in various creeds.
These professions of faith state that Jesus suffered, died, was buried, descended into hell, and rose from the dead, in order to grant eternal life to those who believe in him and trust in him for the remission of their sins.
The term gospel also refers to written accounts of Jesus's life and teaching, four of which—Matthew, Mark, Luke, and John—are considered canonical and included in the Christian Bible.
Christianity is an Abrahamic religion that began as a Second Temple Judaic sect in the mid-1st century.
Martin Luther taught that baptism was necessary for salvation, but modern Lutherans and other Protestants tend to teach that salvation is a gift that comes to an individual by God's grace, sometimes defined as "unmerited favor", even apart from baptism.The Baptists have been non-creedal "in that they have not sought to establish binding authoritative confessions of faith on one another." The Apostles' Creed is the most widely accepted statement of the articles of Christian faith.It is used by a number of Christian denominations for both liturgical and catechetical purposes, most visibly by liturgical churches of Western Christian tradition, including the Latin Church of the Catholic Church, Lutheranism, Anglicanism, and Western Rite Orthodoxy.They began as baptismal formulae and were later expanded during the Christological controversies of the 4th and 5th centuries to become statements of faith.
Many evangelical Protestants reject creeds as definitive statements of faith, even while agreeing with some or all of the substance of the creeds.Because of these irreconcilable differences in theology and a lack of consensus on the core tenets of Christianity, Evangelicals, Protestants, Catholics, and Orthodox often deny that members of certain other branches are Christians.