Once upon a time, in the State of Qi, there was a man who always looked worried all day long. This man was constantly worried that the sky might fall and the earth might cave in. He often looked up at the sky, his heart full of fear.
He couldn't eat well or sleep well. Due to this baseless worry, his health was getting worse and worse. His friends, seeing him like this, were very worried about him and came to persuade him one after another. But he said to his friends, "If the sky falls, we will all be crushed to death." His friends felt both angry and amused when they heard this.
One of his friends said to him, "The sky is just accumulated gas. There is no place without air. You move around and breathe all day long in the sky. Why are you still worried that the sky will fall?" After hearing his friend's words, the man from Qi was half - believing and half - doubting.
After a while, he began to worry that the earth would cave in again. He thought, what could he do if the earth caved in? He was once again plunged into deep worry. Seeing that he was still so worried, his friends continued to enlighten him.
His friends told him that the earth was just piled - up clods of earth, filling everywhere. There was no place without clods of earth. You walk and jump around on the ground all day long. Why are you still worried that the earth will cave in? After hearing his friends' words, the man from Qi finally figured it out. He laughed heartily with relief, realizing that all his previous worries were meaningless. From then on, he no longer worried needlessly like before and lived a normal life.
