Matthew 12:34-35

You brood of vipers, how can you speak good things when you are evil? For the mouth speaks out that which fills the heart. The good man, from his (inner) good treasure, brings out good things; and the evil man, from his (inner) evil treasure brings out evil things. 

We should think before we speak! If we believe we will say something out of line with the word of God, then say nothing until we have rested or adjusted our attitude. We don’t want to be the reason for our problems, but our faith-filled words will raise us when we use them.