Stick out your tongue
One of the first things that a doctor says when he examines a patient is, “Let me see your tongue.” It is often possible to make a diagnosis just by looking inside a person’s mouth. Some diseases can be detected by the tongue’s appearance.
This is even truer as a test of spiritual health. A person’s speech reveals what is going on inside. Jesus said, “Out of the abundance of the heart the mouth speaks” (Mt. 12:34).