Alexander Pope (1763). “An essay on man: By Alexander Pope, Esq. Enlarged and improved by the author. Together with his MS. additions and variations as in the last edition of his works. With the notes of William, Lord Bishop of Gloucester”, p.70
Benjamin Franklin (1987). “Poor Richard's Almanack: Being the Choicest Morsels of Wisdom, Written During the Years of the Almanack's Publication”, p.67, Peter Pauper Press, Inc.