James 3:5

James 3:5 So also the tongue is a small member, yet it boasts of great things. How great a forest is set ablaze by such a small fire!

Your tongue can be very destructive.  It can turn years of labor into ash in a moment.  Be quick to hear, slow to speak, slow to anger; for the anger of man does not produce the righteousness of God. (Jam 1:19-20)