Is the joke of passing on wisdom funny? Tell me about it.

Avanti is very old. One day, his son frowned and said, "Dad, if your old man dies one day, what wealth will we inherit from you?"

Afandi thought about it and sighed: "Son, I have no property and no land. However, don't be depressed. When I die, you will inherit my wisdom. " This is not a very funny joke.