Wise men speak because they have something to say; Fools because they have to say something.
I often regret that I have spoken; never that I have been silent.
I have never been hurt by what I have not said.
He that hath knowledge spareth his words.
Listen! Clam up your mouth and be silent like an oyster shell, for that tongue of yours is the enemy of the soul, my friend. When the lips are silent, the heart has a hundred tongues.
Well-timed silence hath more eloquence than speech.
Before I speak, I have something important to say.
I've learned I'm not lying by not saying anything, so I just don't say it anymore.
Put a bridle on thy tongue; set a guard before thy lips, lest the words of thine own mouth destroy thy peace... on much speaking cometh repentance, but in silence is safety.
