A. B. Simpson

A. B. Simpson was a Canadian preacher, theologian, and author, best known for his work in the Holiness movement and for founding the Christian and Missionary Alliance. His notable book, "Days of Heaven Upon Earth," reflects his deep spiritual insights and commitment to a life of faith. Simpson's writings often emphasize the importance of personal holiness and the transformative power of faith in everyday life. Through his ministry and literature, he contributed significantly to the development of evangelical thought in the late 19th and early 20th centuries.