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.74
George Berkeley, Joseph Stock (1843). “The Works of George Berkeley, D.D., Bishop of Cloyne: Including His Letters to Thomas Prior, Esq., Dean Gervais, Mr. Pope, &c., &c. ; to which is Prefixed an Account of His Life”, p.283