Whatever you do, do not argue with a negative person. Arguing only adds fuel to the fire. A negative person will feed off any negativity that will strengthen his/her mood or attitude. When people are in a crabby mood, it is best to avoid trying to convince them to analyze and adjust their attitude. As soon as we take the approach of being in opposition with them, they seize the opportunity to prove us that life stinks. Their negativity intensifies and the situation gets worse before it gets better. Sometimes the best thing to do is remain silent and let the negativity pass.