According to Chinese legend, when Sai Weng lost one of his prized horses, his neighbor expressed sorrow for his loss. But Sai Weng was unconcerned. He said, "Who knows if it may be a good thing for me?" Surprisingly, the lost horse returned home with another horse. As the neighbor congratulated him, Sai Weng said, "Who knows if it may be a bad thing for me?" As it turned out, his son broke his leg when he rode on the new horse. This seemed like a misfortune, until the army arrived at the village to recruit all able-bodied men to fight in the war. Because of the son's injury, he wasn't recruited, which ultimately could have spared him from death.