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Once a king feels (感到)unhappy and asks a wise (聪明的) old man how he could find happiness.

"That's easy" the old man says, "You just put on a shirt of a happy man. And you'll be happy. " The king thanks the old man and starts to look for a happy man. He visits many countries and meets kings, doctors and others. But they all say they are not happy.

One day, a poor farmer is working in the field (地) and singing all the time (一直). The sun is shining and it is very hot. The farmer looks very happy. The king goes up to him and asks, "Are you happy, my good friend?" "Yes, very happy. " answers the farmer. "Can you sell(卖) me your shirt?" asks the king. "My shirt? But I don't have a shirt. I never have one. " The farmer answers in surprise(惊奇).