When we explain the Zen books, we must first grasp the essence of its semantics, before an accurate interpretation of the language. Jackson in WuDeng HuiYuan(五灯会元)is mainly to explain what is Buddhism. Therefore, the answer to this question is the essence of the semantic in WuDeng HuiYuan(五灯会元).The Buddha is to understand nature, this is the key of buddhism. Buddha nature is reflected in the role. There are eight kinds of effects on the human body. Any kind of action can let us know the buddha. If we understand this point, so many of the statements in WuDeng HuiYuan(五灯会元)is easy to explain.