A.W. TOZER began his lifelong pursuit of God at the age of seventeen after hearing a street preacher. He never attended high school or seminary, his spiritual understanding came from the power of the Word and the power of the Spirit. While serving as a pastor and magazine editor, he wrote prolifically about basic spiritual disciplines and their relationship to contemporary life. His powerful use of words continues to grip the intellect and stir the soul of today's reader.

WARREN W. WIERSBE (Th.B., Northern Baptist Seminary; D.D., Trinity Evangelical Divinity School), former pastor of the Moody Church and general director of Back to the Bible, has traveled widely as a Bible teacher and conference speaker. Because of his encouragement to those in ministry, Dr. Wiersbe is often referred to as "the pastor's pastor." He has authored over 150 books including Ministering to the Mourning, The Wiersbe Bible Commentary, On Being a Servant of God, and the "Be" series. Dr. Wiersbe and his wife, Betty, live in Lincoln, Nebraska.