Quakerism in the context of "Priesthood of all believers"

Evangelicalism (/ˌiːvænˈdʒɛlɪkəlɪzəm, ˌɛvæn-, -ən-/), also called evangelical Christianity or evangelical Protestantism, is a worldwide, interdenominational movement within Protestant Christianity that emphasizes evangelism, or the preaching and spreading of the Christian gospel. The term evangelical is derived from the Koine Greek word euangelion, meaning "good news," in reference to the message of salvation through Jesus Christ. Evangelicalism typically places a strong emphasis on personal conversion, often described as being "born again", and regards the Bible as the ultimate authority in matters of faith and practice. The definition and scope of evangelicalism are subjects of debate among theologians and scholars. Some critics argue that the term encompasses a wide and diverse range of beliefs and practices, making it difficult to define as a coherent or unified movement.

The theological roots of evangelicalism can be traced to the Protestant Reformation in 16th-century Europe, particularly Martin Luther's 1517 Ninety-five Theses, which emphasized the authority of Scripture and the preaching of the gospel over church tradition. The modern evangelical movement is generally dated to around 1738, influenced by theological currents such as Pietism, Puritanism, Quakerism, and Moravianism—notably the work of Nicolaus Zinzendorf and the Herrnhut community. Evangelicalism gained momentum during the First Great Awakening, with figures like John Wesley and the early Methodists playing central roles.

As a general term in theological use, assurance is a believer's confidence in God, God's response to prayer, and the hope of eternal salvation. In Protestant Christian doctrine, the term "assurance", also known as the Witness of the Spirit, affirms that the inner witness of the Holy Spirit allows the Christian disciple to know that they are justified. Based on the writings of St. Augustine of Hippo, assurance was historically an important doctrine in Lutheranism and Calvinism, and remains a distinguishing doctrine of Methodism and Quakerism, although there are differences among these Christian traditions. Hymns that celebrate the witness of the Holy Spirit, such as Fanny Crosby's "Blessed Assurance", are sung in Christian liturgies to celebrate the belief in assurance.

Protestant theology refers to the doctrines held by various Protestant traditions, which share some things in common but differ in others. In general, Protestant theology, as a subset of Christian theology, holds to faith in the Christian Bible, the Holy Trinity, salvation, sanctification, charity, evangelism, and the four last things.

Various Protestant denominations differ in their doctrine, with churches teaching either Wesleyan-Arminian theology, Reformed theology, or Baptist theology. Other evangelical bodies, such as the Lutheran Church–Missouri Synod, Presbyterian Church in America and the Evangelical Friends Church International may subscribe to what they see as the orthodox theology espoused by their historic tradition, such as Lutheranism, Presbyterianism or Quakerism respectively.