I really believe that the strongest people don't speak quickly they rather keep silent and allow someone come out fully from his/her citadel of foolishness. My teacher would always say the heart of a fool is in his lips but mouth of a wise man is in his heart.
Silence keeps a lot of troubles, when you are silent nothing shall be levelled against you. And over silence too isn't goodknow when to act.
Great quote from yester years still making big impact in this our time.