by Nancy Guthrie, Joni Eareckson Tada, Dietrich Bonhoeffer, Corrie ten Boom, John Calvin, J. I. Packer, John Piper, Jerry Bridges, R. C. Sproul, Charles H. Spurgeon, Helen Roseveare, John Newton, D. A. Carson, Martin Luther, Martyn Lloyd-Jones, Jonathan Edwards, Timothy Keller, Sinclair B. Ferguson, Philip Yancey, Saint Augustine, Os Guinness, A. W. Tozer, Abraham Kuyper, Wilson Benton, Jeremiah Burroughs, Thomas Manton