Holiness movement
In 19th century America, the Holiness movement developed out the "new measures" and teachings of revivalist Charles Grandison Finney, and the Methodist emphasis of the Wesleyan teachings of holiness. John Wesley taught that holiness, or Christian perfection, was a definite and instantaneous second work of grace received by faith, and followed by gradual sanctification. Early in the 20th century, many in the Holiness movement also embraced Pentecostalism, which equated the second work of grace with the baptism of the Holy Spirit, whose outward sign was speaking in tongues. The following bodies have primary roots in the Holiness movement and secondary roots in Pentecostalism.