“It is wonderful, when a calculation is made, how little the mind is actually employed in the discharge of any profession.” — Samuel Johnson

“Nothing is so useless as a general maxim.” — Thomas Macaulay

“Bad officials are elected by good citizens who do not vote.” — George Jean Nathan

“An adventure is only an inconvenience rightly considered. An inconvenience is an adventure wrongly considered.” — G.K. Chesterton, “On Running After One’s Hat,” 1908

“I think, therefore I am is the statement of an intellectual who underrates toothaches.” — Milan Kundera

“Generations pass while some trees stand, and old families last not three oaks.” — Thomas Browne

mentimutation
n. a change of mind

“To change your mind and to follow him who sets you right is to be nonetheless the free agent that you were before.” — Marcus Aurelius

“When the facts change, I change my mind. What do you do, sir?” — John Maynard Keynes

“Why should you mind being wrong if someone can show you that you are?” — A.J. Ayer (attributed)

“Never cry over spilt milk, because it may have been poisoned.” — W.C. Fields