Benjamin Franklin, William-Temple Franklin (1818). “Memoirs of the Life and Writings of (the Same), Continued to the Time of His Death by William Temple Franklin. - London, H. Colburn 1818”, p.249
"A Dictionary of Thoughts: Being a Cyclopedia of Laconic Quotations from the Best Authors of the World, Both Ancient and Modern" by Tryon Edwards, New York, Cassell publishing company, (p. 212), 1891.
R. A. Torrey, Edward D. Andrews (2016). “CHRISTIAN LIVING: How to Succeed in the Christian Life [Updated and Expanded]”, p.259, Christian Publishing House