During the Tang Dynasty, a man named Zheng Youxuan lived in Chang’an City. Zheng’s family had status as nobility, while the family of his neighbor, Lu Qiushi, was poor and of a lower social class.
Zheng studied together with Lu’s son. Arrogant about his own family background, Zheng often talked to Lu’s son in a condescending tone. He said to Lu’s son one day, “Your father is not in the same social class as my family, yet we study with the same teacher. Although I don’t say anything, don’t you feel ashamed?”
