The Crumbling Wall
There was once a rich man in the state of Song. After a downpour of rain his wall began to crumble.
"If you don't mend that wall," warned his son, "a thief will get in."
An old neighbor gave the same advice.
That night, indeed, a great deal of money was stolen.
That night, indeed, a great deal of money was stolen. Then the rich man commended his son's intelligence, but suspected his old neighbor of being the thief.