The following story is told about Jonathan Swift, who was a famous English writer. One morning, when Swift was dressing, he found that his shoes were covered with mud. He called his servant to him and said: "My shoes are covered with mud. Why didn't you clean them? You area supposed to clan them each night."
"I though it was useless to clean them in such bad weather," the servant said. "They will only become dirty again in a short time."
Later that day, when the servant appeared for his dinner, there was no food on the table for him. He went to Swift and asked the reason for this.
"I though it was useless for you to eat," Swift said, "because you will only become hungry in a short time."