Charles Haddon Spurgeon (1988). “Spurgeon at His Best: Over 2200 Striking Quotations from the World's Most Exhaustive and Widely-read Sermon Series”, Baker Publishing Group
Louis Lallemant, Jean Pierre de Caussade, Claude De La Colombiere, Jean-Pierre Lafouge (2006). “For God's Greater Glory: Gems of Jesuit Spirituality”, p.81, World Wisdom, Inc