John 14:12

Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father.  

We need to remind ourselves that we are born again replicas of Jesus on this earth.  That means we have been given the measure of faith that Jesus had.  Jesus overcame the world, and we are overcomers of the world.  Jesus used His faith to change circumstances. We can use our faith to change circumstances if we just believe.