A rich lady suddenly went blind.She promised a doctor a lot of money if he could make her see again."If you fail，"she said，"you'll get nothing."The doctor agreed.
The doctor soon discovered what was wrong with her eyes，but he decided not to cure her right away，instead each time he visited，he secretly took some of her things.When he had taken everything he was going to cure her blindness to get some money as well.
Now when the old woman could see again she noticed that all her things had gone and she refused to pay the bill，so the doctor took her befor a judge.
"What the doctor says is true，"she said to the judge，"But I am not well cured because I still can't see any of the things in my house."
Now，do you think she should pay the doctor？