One day a man was walking along the beach when he noticed a boy picking something up and gently placing it into the ocean. Approaching the boy, he asked, "What are you doing?"  

The boy replied, "Putting starfish back into the ocean. The surf is up and the tide is going out. If I don't put them back, they'll die."  

"Son," the man said, "don't you realize there are miles and miles of beach and hundreds of starfish? You can't make a difference!"...