You can fool some of the people all of the time, and all of the people some of the time, but you can not fool all of the people all of the time. Abraham Lincoln
You can fool too many of the people too much of the time. James Thurber
The first principle is that you must not fool yourself – and you are the easiest person to fool. Richard Feynman
He who asks is a fool for five minutes, but he who does not ask remains a fool forever. Chinese Proverb
Do not be fooled into believing that because a man is rich he is necessarily smart. There is ample proof to the contrary. Julius Rosenwald
Better to remain silent and be thought a fool than to speak out and remove all doubt. Abraham Lincoln