Originally published in 1935 by Henry Holt and Company, this insightful and groundbreaking volume is a special investigation of John Wesley's pioneer work toward the New Protestantism and his triumphant reaffirmation in the Age of Enlightenment of the historic Christian faith against "the worship of humanity." It traces the principal stages of his progress through an experiment in religion which yielded negative results and terminated in his evangelical reaction against the humanistic Arminianism of his own Church, to the experiment in the faith of the first Reformers which is the principal source of everything important in his career as preacher, promoter, and general superintendent of the Revival.