This is a portion of the last words of David, a man after God's own heart:
"The Spirit of the Lord spoke in and by me and His word was upon my tongue."
2 Samuel 23: 2
"If anyone can control his tongue, it proves that he has perfect control over himself in every other way. We can make a large horse turn around and go wherever we want by means of a small bit in his mouth. And a tiny rudder makes a huge ship turn wherever the pilot wants it to go, even though the winds are strong. So also the tongue is a small thing, but what enormous damage it can do. A great forest can be set on fire by one tiny spark. And the tongue is set on fire by hell itself, and can turn our whole lives into a blazing flame of destruction and disaster... Sometimes it praises our heavenly Father, and sometimes it breaks out into curses against men who are made like God. And so blessing and cursing come pouring from the same mouth. Dear brothers, surely this is not right."
James, Chapter 4
May this be said of us: "True instruction was in our mouths, and unrighteousness was not found on our lips. For the lips of a priest should preserve knowledge and men should seek instruction from his mouth for he is the messenger of the Lord."
Malachi 2: 5, 7