Negativity

How do you conquer a spirit of negativity? Not up and clear statements, just a regular attitude towards certain people or certain things. Why does it permeate and spread so quickly and so deep? What if I can't do anything about the source? Like a muddy rain that keeps coming, trickling down the face of the everything, making them all tan and brown. I can't get at the sky to make it stop raining. I cannot clean the air to keep it from being full of dirt. All I can do is pray for God to blow the dust away and then wash the car... again.