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
Benjamin Whichcote (1753). “Moral and religious aphorisms collected from the manuscript papers of the reverend and learned Doctor Whichcote; and published in 1703, by Dr. Jeffery. Now re-published, with very large additions, ... by Samuel Salter, ... To which are added, Eight letter”, p.161