One day， a guest was making drawings for the King of the State of Qi. The King of Qi asked him：

“What do you think is the most difficult thing to draw？”

The guest answered：

“Dogs and horses are the most difficult to draw.”

“Then what is the easiest thing to draw？” the King of Qi asked again.

“Ghosts are the easiest to draw，” the guest answered.“People are familiar with dogs and horses， which they see every day， so dogs and horses are the most difficult to draw. As to ghosts， no one has ever seen them， so one can draw them any way one likes. Therefore， ghosts are the easiest to draw.”endprint