The boy was tired of being the sun and wanted to be a stone that didn't need to shine.
Not long after, he was kidnapped by a vicious dog. The vicious dog had a "ferocious look" and called the boy's parents: "Bring his happiness to rescue him."
The boy was silent for a long time.
I'd better be the sun.
Purpose: The story is written for people who are trapped by sensitivity and are used to pretending to be optimistic: you don't have to hold on alone, there is always someone willing to catch all your little insecurities.