Mulla Nasruddin’s son came home late from school. The Mulla grabbed him and gave him a beating, saying, “Let this be a lesson to you not to come home late!”
The next day the boy came home with his clothes dirty from playing. The Mulla gave him a good smacking, saying, “Let this be a lesson to you not to dirty your clothes!”
The following day the boy came home with bad grades. The Mulla beat him again, saying, “Let this be a lesson to you not to get bad grades!”
The fourth day, as soon as the son came home, the Mulla just grabbed him and beat him.
“What is the matter, father?” asked the boy, crying. “Today I came on time, with clean clothes, and with good grades!”
“Let this be a lesson to you,” said Mulla Nasruddin. “There is no justice in the world!”