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
Gary L. Thomas (2010). “Sacred Marriage: What If God Designed Marriage to Make Us Holy More Than to Make Us Happy? (Large Print 16pt)”, p.45, ReadHowYouWant.com