The tongue usually promotes a double standard. Your tongue reflects your spirit. Our speech problems are really heart problems. Our tongues are the servants of our spirit. My words simply reveal what's in my heart.
All talk is really heart talk.
But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment. For by thy words thou shalt be justified, and by thy words thou shalt be condemned. When I was a boy, my mother had a cure for talking back, or lying. She would compel me to stick out my tongue while she sprinkled black pepper on it. It was a great lesson.