Source: Wikipedia

Wesleyanism or Wesleyan theology is the system of Christian theology of Methodism  taught by John Wesley. At its heart, the theology of John Wesley stressed the life of Christian holiness: to love God with all one’s heart, mind, soul and strength and to love one’s neighbour as oneself. Wesley’s teaching also stressed experiential religion and moral responsibility.

Wesleyanism, manifest today in Methodist and holiness churches, is named for its founders, John Wesley and, his brother, Charles Wesley. In 1736, these men traveled to the Georgia colony in America as missionaries for the Church of England; they left rather disheartened at what they saw. Both men then had "religious experiences", especially John in 1738, being greatly influenced by the pietist movement. They began to organize a movement within the Church of England to focus on personal faith and holiness, and they succeeded. John Wesley took the reformation churches to task over the nature of sanctification, the process by which a believer is made to conform to the image of Christ, and in many ways restored the New Testament teachings regarding the work of God and the believer in sanctification. The movement did well within the Church of England in Britain, but when the movement crossed the ocean into America, it took on a form of its own, finally being established as the Methodist Episcopal Church in 1784. The Wesleyan churches are very similar to Anglicanism, yet have added a strong emphasis on personal faith and personal experience.