John Locke was one of the greatest Enlightenment thinkers. In the second volume of An Essay Concerning Humane Understanding, Locke lays out the view that every idea originates from sensation or reflection. Locke advances a systematic argument for the existence of God through which he writes, "...our reason leads us to the knowledge of this certain and evident truth, that there is an eternal, most powerful, and most knowing being; which whether any one will please to call God, it matters not " Alacrity Press is proud to make this work of classic political theory, An Essay Concerning Humane Understanding, Volume II by John Locke available to modern readers.