http://libertytree.ca/quotes/Cato.Quote.38AE
"Whoever would overthrow the Liberty of a Nation, must begin by subduing Freedom of Speech... Without Freedom of Thought, there can be no such Thing as Wisdom; and no such Thing as publick Liberty, without Freedom of Speech..."
-- Cato
John Trenchard (1662-1723) & Thomas Gordon (169?-1750)
Source: Letters, 1720