An hereditary chief, strictly limited, the right of war vested in the legislative body, a rigid economy of the public contributions, and absolute interdiction of all useless expenses, will go far towards keeping the government honest and unoppressive. But the only security of all is in a free press. The force of public opinion cannot be resisted, when permitted freely to be expressed. The agitation it produces must be submitted to. It is necessary, to keep the waters pure.

Letter to Marquis de la Fayette (November 4, 1823); in: The Writings of Thomas Jefferson, Memorial Edition (ME) (Lipscomb and Bergh, editors), 20 Vols., Washington, D.C., 1903-04, Volume 15, page 491.