How many times have you told yourself that you can't do something? Well, probably you can do it.
Mary was eleven years old and she had something seriously wrong with her nervous system (神经系统). She was not able to walk. In fact, she could hardly move. Though she believed that she had a good chance to get well again, the doctor said that few people could do it after getting this disease. The little girl didn't give up after she heard this. When she was lying in her hospital bed, she believed that no matter what the doctors said, her going back to school was possible.
She was sent to a health center. Every method was tried but none worked. However, she would not give up. It seemed that nothing could beat her. The doctors all admired her and taught her to imagine that she could make it. Every day Mary would lie there, doing her mental (心理的) exercise carefully.
One day, as she was imagining her legs moving again, it seemed as if a miracle(奇迹) happened, the bed began to move. "Look! what I'm doing! Look! I can do it! I moved!" she cried. At this moment everyone else in the hospital was frightened. They were crying, rushing for safety. And everything was falling. It was an earthquake. But Mary believed that she did it, just as she had never doubted that she would get well. And now only a few years later, she's back in school. You see, to such a person who can shake the earth, such a disease is a small problem, isn't it?