An old man was picking up starfish off the beach and tossing them out into the sea. A young man approached him and saw the starfish and questioned the old man, "why in the world are you throwing the starfish into the water?
"If the starfish are still on the beach when the tide goes out and the sun rises high in the sky, they will die" replied the old man.
"That's ridiculous replied the young man. There are thousands of miles of beach and
millions of starfish. You can't really believe that what you are doing could possibly
make a difference?"
The wise old man picked up another starfish, paused thoughtfully, and remarked as he tossed it out into the waves,
"It makes a difference to this one" he said.