"Greetings!" said Nasruddin.
The guards nodded silently in reply.
"I would like to know what your duties are exactly. Can you tell me why you are standing guard here?" asked Nasruddin.
"We stand guard to keep any thieves from climbing over the wall."
"I see," said Nasruddin. "And are you more concerned about thieves from outside who are trying to get into the palace, or thieves inside the palace who are trying to get out?"
Inspired by: The World of Nasrudin by Idries Shah, free to read online at the Idries Shah Foundation.
Notes: This is story #177 in the book.