Under Gods Command
Proverbs 18.21 The tongue has the power of life and death, and those who love it will eat its fruit.
Satan uses the tongue to divide people and pit them against one another. Idle and hateful words are damaging because they spread destruction quickly, and no one can stop the results once they are spoken. We dare not be carless with what we say thinking we can apologize later, because even if we do, the scars remain. A few words spoken in anger can destroy a relationship that took years to build. Before you speak, remember that words are like fire-you can neither control nor reverse the damage they can do.
Under Gods command 
I agree with this 100% would just like to add before we write anything too as writen words are painful or joyful too.
I agree 100%. Sometimes it hurts more than spoken words.