Source: James Madison, Letter to W.T. Barry (1822-08-04), in Gaillard Hunt, ed., The Writings of James Madison vol. 9 (1910), p. 103. These words, using the older spelling “Governours”, are inscribed to the left of the main entrance, Library of Congress James Madison Memorial Building.

Complete Quote: A popular Government without popular information, or the means of acquiring it, is but a Prologue to a Farce or a Tragedy, or perhaps both. Knowledge will forever govern ignorance: And a people who mean to be their own Governors, must arm themselves with the power which knowledge gives.