"I never learned from a man who agreed with me." - Robert Heinlein

"Remember that silence is sometimes the best answer." - Hello Dalai

also, a wise man talks because he has something to say; a fool talks because he has to say something (man, i just had to say that, for some reason). but it's better to remain silent and be thought a fool than to open one's mouth and confirm it. as i've just demonstrated.