James C. Humes, Benjamin Franklin (1995). “The wit and wisdom of Benjamin Franklin: a treasury of more than 900 quotations and anecdotes”, Harpercollins
Thomas Hobbes (1840). “The English Works of Thomas Hobbes of Malmesbury: Dialogue between a philosopher and a student of the common laws in England. Behemoth: The history of the causes of the civil wars of England. The whole art of rhetoric. The art of rhetoric, plainly set forth. The art of sophistry”, p.174