Thomas Jefferson speaks about a famous letter of advice he wrote to his grandson Thomas Jefferson Randolph on November 24, 1808.
Included in the letter was this paragraph:
When I hear another express an opinion which is not mine, I say to myself, He has a right to his opinion, as I to mine; why should I question it? His error does me no injury, and shall I become a Don Quixote, to bring all men by force of argument to one opinion? If a fact be misstated, it is probable he is gratified by a belief of it, and I have no right to deprive him of the gratification. If he wants information, he will ask it, and then I will give it in measured terms; but if he still believes his own story, and shows a desire to dispute the fact with me, I hear him and say nothing. It is his affair, not mine, if he prefers error.