James 3:5-6, 8-9

Even so the tongue is a little member, and it can boast of great things. See how much wood or how great a forest a tiny spark can set ablaze! And the tongue is a fire. [The tongue is a] world of wickedness set among our members, contaminating and depraving the whole body and setting on fire the wheel of birth (the cycle of man's nature), being itself ignited by hell (Gehenna).

But the human tongue can be tamed by no man. It is a restless (undisciplined, irreconcilable) evil, full of deadly poison. With it we bless the Lord and Father, and with it we curse men who were made in God's likeness!