Contrast is used to reveal a truth again. A righteous mouth versus a perverse tongue. Righteous lips versus a wicked mouth. These have been common subjects in Solomon’s proverbs. The object of the lesson is to examine me, not to judge him or her.
When I speak I want to be wise, clever, funny, spiritual, and heartful. When I am not, one of several emotions hangs onto my heart like a leech onto my skin. Am I wrong about my conclusion that my lips are faulty? Jesus tells me that the source of my words comes from my heart. When he rebuked Peter he said, “You do not have in mind the things of God, but the things of men.”
I am amazed that Jesus always had the right words to say when he spoke to people. Some people consider some of his words hard and/or harsh. If I were to say some of the things he said I would be self-conscience for quite a while. Frankly, I do not know what to think about my words except I need to be filled with the Holy Spirit who is the source of wisdom and love.