“Only fools and dead men don't change their minds. Fools won't and dead men can't.”
“Wise men profit more by fools than fools by wise men.”
“The way of a fool seems right to him, but a wise man listens to advice.”
“Few things are needed to make a wise man happy; nothing can make a fool content; that is why most men are miserable.”
“Rules are for the obedience of fools and the guidance of wise men.”