Matthew 15:11 It is not what enters into the mouth that defiles the man, but what proceeds out of the mouth, this defiles the man. This verse is pretty self explanatory. The thing that comes to mind when reading it is that one must really, really think before they say something. You cannot take words back. If they are hurtful or harming in any kind of way proves that you either have an unclean spirit within you. Or you are truly self indulgent and do no care what or how you say it. Either or makes a horrible disposition. So work hard at the words you speak. Think before you open your mouth. If you are at a plateau in conversation and your buttons have been pushed, stay still for a moment. Think on what you might say. Remember you are loved by the most high. Show the same towards your fellow man.