Each of us makes mistakes from time to time. In fact, we can get a lot from our mistakes.
Donnie was a shy student and never answered questions in class. He was afraid to make mistakes. He never finished his homework because he didn't want to make any mistakes. Nothing changed till Marry Anne, a teacher, came to our class.
One morning, Marry Anne asked Donnie to answer some questions. After a while Donnie was in tears because he made a mistake. Suddenly Marry Anne got a box full of erasers from the desk.
"Look, Donnie," she said standing beside him. "I have something to show you." She took out the erasers, one at a time, and put them on the desk.
"See these erasers, Donnie?" she asked. "Do you know why the erasers become smaller and smaller? That's because we make mistakes. But we erase the mistakes and try again. That's what you must learn."
"Here," she said, "I'll leave one eraser on your desk, so you will remember that everyone may make mistakes." Donnie looked at Marry Anne and smiled.
Donnie changed a lot from then on. He knew that everyone had the permission(许可) to make mistakes as long as you learned them and tried again.