"In the fevered state of our country, no good can ever result from any attempt to set one of these fiery zealots to rights, either in fact or principle. They are determined as to the facts they will believe, and the opinions on which they will act. Get by them, therefore, as you would by an angry bull; it is not for a man of sense to dispute the road with such an animal." - President Thomas Jefferson

"Basic truths cannot change, and once a man of insight expresses one of them it is never necessary, no matter how much the world changes, to reformulate them." - Robert A. Heinlein