http://en.wikiquote.org/wiki/Abraham_Lincoln
Dear George W. Bush,
It is now for them to demonstrate to the world that those who can fairly carry an election can also suppress a rebellion; that ballots are the rightful and peaceful successors of bullets; and that when ballots have fairly and constitutionally decided, there can be no successful appeal back to bullets… Such will be a great lesson of peace: teaching men that what they cannot take by election, neither can they take it by war; teaching all the folly of being the beginners of a war.
Signed,
Abraham Lincoln
(I can’t believe I haven’t previously thumbed-up a page of Lincoln quotes. Oversight rectified.)