A man goes to see his doctor one day. He is not sleeping well.

The doctor examines（檢查） him carefully. Then he says，“Well，theres nothing really wrong with you. You just worry（擔憂） too much. I know another man. He is not sleeping，just like you. He doesnt have money to pay（付） his tailor. He gets very worried. I tell him not to worry. Hes much better now.”

“Yes，I know，” the man says，“You see，I am his tailor.”