James 3:5-6; James 4:1

5 So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire! 6 And the tongue is a fire, the very world of iniquity; the tongue is set among our members as that which defiles the entire body, and sets on fire the course of our life, and is set on fire by hell.
1 What is the source of quarrels and conflicts among you? Is not the source your pleasures that wage war in your members?