Tell me about my father's purpose of quoting Kong Rong to let pears?

Kong Rong was smart, studious and tactful when he was a child. Everyone praised him as a child prodigy. At the age of 4, I can recite many poems and songs and understand etiquette. His parents love him very much. One day, his father bought some pears and specially chose the biggest one for Kong Rong. Kong Rong shook his head, but picked the smallest one and said, "I'm the youngest. I should eat the small one."

For the purpose of ...

Learn to be modest, learn to be sensible, make way for the younger brothers and sisters below, and respect the elderly in the world.