Read James 3:1-12
3:1 Not many of you should become teachers, my brothers and sisters, for you know that we who teach will be judged with greater strictness.
3:2 For all of us make many mistakes. Anyone who makes no mistakes in speaking is perfect, able to keep the whole body in check with a bridle.
3:3 If we put bits into the mouths of horses to make them obey us, we guide their whole bodies.
3:4 Or look at ships: though they are so large that it takes strong winds to drive them, yet they are guided by a very small rudder wherever the will of the pilot directs.
3:5 So also the tongue is a small member, yet it boasts of great exploits. How great a forest is set ablaze by a small fire!
3:6 And the tongue is a fire. The tongue is placed among our members as a world of iniquity; it stains the whole body, sets on fire the cycle of nature, and is itself set on fire by hell.
3:7 For every species of beast and bird, of reptile and sea creature, can be tamed and has been tamed by the human species,
3:8 but no one can tame the tongue--a restless evil, full of deadly poison.
3:9 With it we bless the Lord and Father, and with it we curse those who are made in the likeness of God.
3:10 From the same mouth come blessing and cursing. My brothers and sisters, this ought not to be so.
3:11 Does a spring pour forth from the same opening both fresh and brackish water?
3:12 Can a fig tree, my brothers and sisters, yield olives, or a grapevine figs? No more can salt water yield fresh.
This passage from James 3 is one of the most explicit passages about the power of the tongue. The Psalmist spoke blessings to his soul: "Return, O my soul, to your rest." The teacher in Isaiah learns to "sustain the weary with a word."
James 3:2 "For all of us make many mistakes. Anyone who makes no mistakes in speaking is perfect, able to keep the whole body in check with a bridle."
Lord you know my mistakes, I am not perfect. Help me to keep my self, and my tongue 'in check'.