St. Thomas Aquinas, St. Teresa of Avila, Thomas à Kempis, St. Augustine, Pope Gregory I, Martin Luther, Leo Tolstoy, Friedrich Nietzsche, Thomas Paine, Athanasius of Alexandria, Gregory of Nyssa, Basil The Great, John of Damascus, Brother Lawrence, David Hume, Ludwig Feuerbach, Andrew Murray, G. K. Chesterton, Arthur Pink, Dante Alighieri, John Milton, John Bunyan, Voltaire, Lew Wallace, Henryk Sienkiewicz, Charles M. Sheldon, Henry Van Dyke, Grace Livingston Hill, Fyodor Dostoyevsky, Johann Wolfgang von Goethe, Ralph Waldo Emerson, H. Emilie Cady, James Allen, Prentice Mulford, Florence Scovel Shinn & R. S. Grignon
