Since ghosts were human once there must be certain similarities between the two, and this is why items of food and other useful articles were buried alongside the dead.
也就是說，除了極少數修煉得道者能升天成仙外，其餘眾生都難逃「在世為人，死後為鬼」的鐵律。鬼既然是人變的，鬼性和人性自有相通之處，於是以人吃的、人用的陪死者下葬，便成了順理成章的事。