I’ve been thrilled recently as I listened to John’s Piper’s biographical messages on significant Christian thinkers, preachers, and missionaries. I like them for their warmth and clarity, for their focus on their subjects’ walk with God, and for their willingness to draw attention to human weaknesses, as well as God-given strengths. Be inspired by the life and ministry of John Calvin, Charles Simeon, William Wilberforce, C.H. Spurgeon, John G. Paton, J. Gresham Machen, D.M. Lloyd-Jones, and others. Go here to read, download, or listen online.