A LOT IS SAID IN THE BIBLE ABOUT THE TONGUE.  JAMES, BEING THE HALF BROTHER OF JESUS, PROBABLY KNEW A LOT ABOUT WHAT JESUS THOUGHT.  LOOK WHAT HE TELLS US IN JAMES 3:2 WHERE HE SAYS "For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body."  WE TEND TO SAY THINGS WITHOUT THINKING AND THAT'S VERY DANGEROUS.  WHEN YOU ARE TELLING THAT ILLNESS TO LEAVE YOU IN THE NAME OF JESUS, THAT IS A POSITIVE WORD WHICH CAN BRING HEALING.  HOWEVER, HOW MANY TIMES A DAY DO YOU SPEAK NEGATIVE WORDS.  YOU SEE A WRECK AND SAY THINGS LIKE, "THAT'S GOING TO BE ME ONE OF THESE DAYS THE WAY I DRIVE". SOMEONE COMES IN WITH THE FLU AND YOU SAY, "WELL I GUESS I WILL HAVE THAT BEFORE LONG".  SOMEONE HAS A HEART ATTACK AND YOU SAY, "THAT RUNS IN MY FAMILY AND I KNOW THAT WILL BE THE WAY I GO".  POSITIVE AND NEGATIVE WORDS COMING OUT OF THE SAME MOUTH.  JAMES ALSO SAYS IN VERSE 3:10 "Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be."