Proverbs 17:27 “A man of knowledge uses words with restraint, and a man of understanding is even-tempered.” Words can display both thought and thoughtlessness.  Knowing this thought should generate a careful choice of when to use wise words and when to remain silent.  To speak just to hear sound is both foolish and can be very detrimental.  God gives us the ability to speak, and we should use that ability wisely and to His honor.