Once upon a time there was a man strolling at beach. Suddenly he saw a woman at a some distance picking up something from the ground and throwing into the ocean.
He started walking towards the woman. When he reached there, he saw thousands of starfish were stranded on the beach due to strong tide.
The woman was picking up each starfish and throwing it back into the ocean so that it can live. The man told the woman that she will not be able to save all the starfish since there were thousands of them and her efforts might not make much difference.
The woman looked at the man and smiled. Then she picked up a starfish, threw it in the ocean and said it made a difference to that one !!
Moral :- Your smallest good effort can matter most for somebody.