Wise men speak because they have something to say; Fools because they have to say something.
Words empty as the wind are best left unsaid.
Say not always what you know, but always know what you say.
He that hath knowledge spareth his words.
I've always been a guy who's reserved my words for the right time.
There is a better thing than the great man who is always speaking, and that is the great man who only speaks when he has a great word to say.
My favourite commentators are the ones that don't need to hear the sound of their own voice the whole time.
I really don't have anything urgent to say, and I think you shouldn't write unless you have something urgent to say. Sometimes that troubles me, and sometimes I don't really care.