Second work of grace
According to some Christian traditions, a second work of grace is a transforming interaction with God which may occur in the life of a Christian. The defining characteristics of this event are that it is separate from and subsequent to salvation (the first work of grace), and that it brings about significant changes in the life of the believer.
John Wesley, the founder of the Methodist movement, taught that there were two distinct phases in the Christian experience. During the first phase, conversion, the believer received forgiveness and became a Christian. During the second phase, sanctification, the believer was purified and made holy. Wesley taught both that sanctification could be an instantaneous experience, and that it could be a gradual process.
After Wesley's death, mainstream Methodism emphasized sanctification as a gradual experience, and over time it became less prominent in Methodist teaching. The Holiness Movement emerged in the 1860s in the USA with the desire to re-emphasize Wesley's sanctification doctrine. Holiness preachers taught that sanctification was an instantaneous experience.
Later, the Pentecostal Movement emerged from the Holiness Movement, teaching that the believer could, in addition to becoming sanctified, receive power from God and the Gifts of the Holy Spirit. In early Pentecostal thought this was sometimes considered to be a third work of grace but over time it has come to be perceived as the major component of the second experience.
The Holiness Movement 
In Pentecostalism, believers are encouraged to seek the Baptism with the Holy Spirit. In most Pentecostal churches, the outward evidence of this experience is the manifestation of the Gifts of the Holy Spirit, most particularly including the Gift of tongues.
- Synan, Vinson (1997). The Holiness-Pentecostal tradition: Charismatic movements in the twentieth century. Wm. B. Eerdmans Publishing. pp. 6â7. ISBN 978-0-8028-4103-2. Retrieved 5 March 2011.
- Alexander, Donald L.; Ferguson, Sinclair B. (1988-12). Christian spirituality: five views of sanctification. InterVarsity Press. p. 97. ISBN 978-0-8308-1278-3. Retrieved 5 March 2011.
- Curtis, Harold (2006-09-21). Following the Cloud: A Vision of the Convergence of Science and the Church. Harold Curtis. p. 86. ISBN 978-1-4196-4571-6. Retrieved 5 March 2011.
- Southey, Robert (1820). The life of Wesley: and the rise and progress of Methodism. Evert Duyckinck and George Long; Clayton & Kingsland, printers. p. 80. Retrieved 5 March 2011.
- Archer, Kenneth J. (2004-12-30). A Pentecostal hermeneutic for the twenty-first century: spirit, scripture and community. Continuum International Publishing Group. p. 15. ISBN 978-0-567-08367-8. Retrieved 5 March 2011.
- Fudge, Thomas A. (2003-04). Christianity Without the Cross: A History of Salvation in Oneness Pentecostalism. Universal-Publishers. p. 16. ISBN 978-1-58112-584-9. Retrieved 25 August 2011.
- Sproul, R. C. (2009-09-30). Romans. Crossway. p. 224. ISBN 978-1-4335-0685-7. Retrieved 5 March 2011.