One day, his father gave him a huge bag of nails. He asked his son to hammer one nail to the fence every time he became angry and lost his temper. The little boy found it amusing and accepted the task.
Every time he lost his temper, he ran to the fence and hammered a nail. His anger drove him to hammer nails on the fence 30 times on the first day! After the next few days, the number of nails hammered on the fence was reduced to half. The little boy found it very difficult to hammer the nails and decided to control his temper.