William Cowper, John William Cunningham, William Hayley (1835). “The Life and Works of William Cowper: His life and letters by William Hayley. Now first completed by the introduction of Cowper's private correspondence”, p.369
Alexander Pope (1846). “An Essay on Man: In Four Epistles to H. St. John (Lord Bolingbroke). To which are Added, The Universal Prayer, An Essay on the Knowledge and Character of Men, and Other Pieces, with Notes”, p.61
Solomon ben Judah Ibn Gabirol, Benjamin Henry Ascher (1859). “A Choice of Pearls: Embracing a Collection of the Most Genuine Ethical Sentences, Maxims and Salutary Reflections”, p.145