True Christians must learn to control what comes out of their mouth. Proverbs 16:23 says:
“The heart of the wise teacheth his mouth, and addeth learning to his lips.”
Educate yourself in good things, so you will have good, upbuilding things to say:
“The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.”
So don’t speak hastily. The things you say are very important; and many people aren’t careful about that. But God is highly concerned! (Ps. 37:30-31).
Sometimes what we say results in arguments. The root cause is usually pride (Luke 22:24) – a result of someone thinking too highly of himself. Lust is also a huge factor in division among people (Jam. 4:1). God says He resists the proud and give grace to the humble – not to the loudest, the most powerful, or the quickest of wit. Remember, if we’re looking out for the other person instead, that will eliminate a lot of arguing.
The Apple Of God's Eye 