"A wise man once said nothing."
"Wise men speak because they have something to say; fools because they have to say something."
"Saying nothing sometimes says the most."
"If you can't be kind, be quiet."
"Evil grows when good people do and say nothing."
"A fool thinks himself to be wise, but a wise man knows himself to be a fool." - William Shakespeare
"A wise man changes his mind, a fool never will."
