“Wise men speak because they have something to say; Fools because they have to say something,”–Plato.
Silence is priceless when you have very little or meaningless things to say or contribute to an issue or debate. Even a fool will be respected when he chooses to hold his peace.
More harm is caused when you talk just for the sake of it. Decision to remain speechless keeps the opposition guessing and sometimes put you at a vantage position.
Your words will either justify or condenm you. So when next you choose to speak, remember that you will be held accountable for every word that comes out of your mouth.