Evil words destroy; even righteous causes that God has established. Some enjoy making "cutting" remarks, but words of wisdom seek, peace, benefit, and healing. Those who tend towards "talking TOO MUCH" will suffer the consequences ! Some have even died for saying the WRONG thing ! Some ruin their own chances by their own foolishness and then blame it on the Lord. Many engage in perpetual arguments, their mouth is their undoing and their words endanger them. It's hard to stop a quarrel once it begins. To the wise a fitting silence is golden.  

Proverbs 18:21 King James Version (KJV)

21 Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.