Ralph Earle served as professor emeritus of New Testament at Nazarene Theological Seminary in Kansas City, Missouri, where he first began teaching in 1945. He served on the Committee on Bible Translation, which is the governing body for the New International Version of the Bible. Earle earned degrees from Eastern Nazarene College, Boston University, and Gordon Divinity School. He also took post-doctoral courses at Harvard and Edinburgh Universities. Richard S. Taylor, Th.D., was a writer, preacher, and professor of theology and missions at Nazarene Theological Seminary. His significant contributions as an author include The Disciplined Life; Exploring Christian Holiness, Vol. 3: The Theological Formulation; and A Right Conception of Sin. A.F. Harper is a prolific writer and well-known for the Beacon Hill classic Holiness and High Country. He has also written or contributed to a number of books including, Now That Retirement Has Come, The Story of Ourselves, Great Holiness Classics, Vol. 6, and co-author of Exploring Christian Education.