Who Is Taking My Cheese

I read this book many years ago. It's an interesting story and told us a great principle.

It's said that there were three mice in a maze and they were looking for the exit. They were very hungry. Maybe they would be dead before they got out. But they found a lot of cheese in a place, they were very happy and stopped looking for the exit. They took the cheese every day until they finished. They said, "Who is taking my cheese?!" When they didn't have any cheese. In face, it was them. They continued looking for the exit or any other cheese. Finally, they failed and they were all dead in the maze because of hunger.

It told us that if we had some luxury to do something before we were done, we should worry and think about what would come.