Be angry but do not sin. Do not let the sun go down on your anger. Do not give place to the devil.
…Let no unwholesome word proceed out of your mouth, but only that which is good for building up, that it may give grace to the listeners.
Watch the way you talk. Let nothing foul or dirty come out of your mouth. Say only what helps, each word a gift. [The Message]
But now you yourselves are to put off all these: anger, wrath, malice, blasphemy, filthy language out of your mouth.
Let your speech always be with grace, seasoned with salt, that you may know how you should answer everyone.
Death and life are in the power of the tongue, and those who love it will eat its fruit.
My brothers, not many of you should become teachers, knowing that we shall receive the greater judgment. We all err in many ways. But if any man does not err in word, he is a perfect man and able also to control the whole body.
See how we put bits in the mouths of horses that they may obey us, and we control their whole bodies. And observe ships. Though they are so great and are driven by fierce winds, yet they are directed with a very small rudder wherever the captain pleases. Even so, the tongue is a little part of the body and boasts great things. See how great a forest a little fire kindles. The tongue is a fire, a world of evil. The tongue is among the parts of the body, defiling the whole body, and setting the course of nature on fire, and it is set on fire by hell.
All kinds of beasts, and birds, and serpents, and things in the sea are tamed or have been tamed by mankind. But no man can tame the tongue. It is an unruly evil, full of deadly poison.
With it we bless the Lord and Father, and with it we curse men, who are made in the image of God. Out of the same mouth proceed blessing and cursing. My brothers, these things ought not to be so. Does a spring yield at the same opening sweet and bitter water? Can the fig tree, my brothers, bear olives, or a vine, figs? So no spring can yield both salt water and fresh water.
Who is wise and understanding among you? Let him show his works by his good life in the meekness of wisdom. But if you have bitter envying and strife in your hearts, do not boast and do not lie against the truth. This wisdom descends not from above, but is earthly, unspiritual, and devilish. For where there is envying and strife, there is confusion and every evil work.
But the wisdom that is from above is first pure, then peaceable, gentle, open to reason, full of mercy and good fruits, without partiality, and without hypocrisy. And the fruit of righteousness is sown in peace by those who make peace.
You shall not take the name of the Lord your God in vain, for the Lord will not hold guiltless anyone who takes His name in vain.
*While swearing and obscenities are fine tools for bullies, this is not intended as an endorsement of censorship by governments or ecclesiastical councils. It is an appeal to each one of us to exercise personal strength in communication, making censorship unnecessary. I don’t want to take away your right to inappropriate or indecent speech. I simply hope to correct the false tenet that obscenity improves life. It simply does not. I laugh when someone implies that anyone is shocked by obscenities. The practice is just so commonplace. In fact, my proposal would bring back the shock value of expletives.