There was a rich man who was both handsome and wise, earning everyone's admiration.
A fool, upon learning this, began calling the rich man "My big brother" whenever they met. He reasoned that, as a "younger brother," he could borrow money from him when needed.
Later, the rich man lost his fortune. The fool stopped calling him "big brother." His neighbors asked, "How foolish! Why call him brother when you needed his money, but stop when he fell into debt?"
The fool replied, "I called him brother because I wanted his money. He was never truly my brother. Now that he's in debt, I naturally stopped."