Jesus said in Matthew 12:34 

“For out of the overflow of the heart the mouth speaks.” Jesus reveals in this verse that what comes out of our mouths displays what is in our hearts. Our words have an effect on the people around us, but perhaps more importantly they affect us. 

 Our words have the power to direct the course of our lives – toward good, or toward destruction.  And our mouths have the ability to praise God or praise self – to give witness to God’s goodness and mercy, or to shout curses.  Such a little piece of anatomy; so much influence.