"Set a guard, O Lord, over my mouth;  Keep watch over the door of my lips."  Psalm 141:3.  This verse is short and to the point, but it can be one of the toughest obstacles for us to overcome.  The power of life and death are in the tongue and what we choose to speak is more critical than we realize.  Too many times, we do the devil's work by simply opening our mouths.  And though it can be tough to admit, I myself have fallen victim and had to retract my words on more than...