In front of 4000 people, Jesus yet again shows a wondrous work, feeding all 4000 people with just few breads and fish. This miraculous work started with His loving heart, "I have compassion for them." In contrary, Pharisees demand yet another signs from the heaven like some kind of magic tricks. And, Jesus refuses to show with great sorrow. See, Jesus' miraculous works come from His selfless and true act of love. In Christianity, miracles are defined as an act of love not a magic tricks.