One day, a man was walking along a beach that was littered with thousands of starfish that had been washed ashore by the high tide. As he walked he came upon a young boy who was eagerly throwing the starfish back into the ocean, one by one.
Puzzled, the man looked at the boy and asked what he was doing. Without looking up from his task, the boy simply replied, “I’m saving these starfish, sir.”
The man chuckled. “But there must be tens of thousands of starfish on this beach. I’m afraid you won’t really be able to make much of a difference.”