There is an ancient Chinese legend of an old man and his only son. One night the old man's horse escaped, and the neighbors came to comfort him in his loss. "How do you know this is a bad thing?" he asked them.

Several days later his horse returned with a herd of wild horses. Now his friends came to congratulate the farmer for his good fortune. But the old man said, "How do you know this is a good thing?"

While his son was trying taming one of the wild horses, he is thrown and breaks his leg. Again his friends gathered to bemoan his new misfortune. But the old man asked, "How do you know this is a bad thing?"

Soon a warlord came to recruit able-bodied youth for his army, and the farmer's son escaped conscription because of his broken leg. In true fashion, the farmer's neighbors came and expressed their pleasure over the man's good luck. "How do you know it's a good thing?" he asked. The story can go on forever. Good fortune can quickly turn on you and bad fortune may be a blessing in disguise.