Stars

A man was walking along the shore and suddenly saw a boy who was lifting something from the sand and throwing it into the sea. The man came closer and saw that the boy was lifting starfish from the sand. They surrounded him on all sides. It seemed that there were millions of starfish on the sand, the coast was literally strewn with them for many kilometers.
- Why are you throwing these starfish into the water? The man asked, coming closer.
“If they stay on the shore until tomorrow morning, when the tide begins, they will die,” the boy replied, without stopping his occupation.
- But this is just stupid! The man shouted. - Look around! There are millions of starfish here, the coast is simply littered with them. You can't change anything!
The boy raised the next starfish, thought for a moment, threw it into the sea and said:
- Maybe I won't have time to help all the stars, but I've already changed a lot ... for this star.