A small child is walking on an immense beach. One by one he picks up the starfish washed up by million on the sand and delicately puts them back into the water. An old man, watching him, approaches and asks him : “What are you doing son ? Can’t you see that your gesture is useless ? You could never save all of them.” He lifts his eyes reaching up with a starfish towards the incredulous man and replies : “for this one it changes everything”.