You can do more damage with your words than you can with any other part of your body or any other thing you have control over. With technology and word-of-mouth potential, you can destroy a person with words and not even be in the same room with them.
There’s good news on the flip side of that, though: Your words have the power to build others up. The tongue really is a miraculous thing. We don’t see anything else in all of nature where two opposing things can come from the same source. The tongue has the power to destroy and the power to build up.