郑玄“爻辰说”新探

A New Exploration of Zheng Xuan’s Theory of Yaochen

郑玄提出爻辰说,并广泛应用于注《易》,成为其易学的一个重要理论。在学术渊源上,郑玄爻辰说继承汉易象数学中的以爻值辰,对京房"纳支说"、《易纬·乾凿度》"间时而治六辰"有所损益。在卦行次序上,郑玄爻辰说对京房易学与《易纬》阴阳二卦运行次序有所革新,将阴阳奉迎转变为阳行阴随。在卦爻地位上,郑玄爻辰说重视爻的核心地位,将以卦应时转变为以爻值辰,一改京房易学及《易纬》中卦的核心地位。由此,郑玄以爻作为《周易》的变易源头,丰富了《周易》的变易理论。

Zheng Xuan put forward the theory of Yaochen,which was widely used in the explanation of the Book of Changes,and became an important theory in his studies of the Book of Changes.From the perspective of academic origin,Zheng Xuan’s theory of Yaochen inherits the studies of Xiang and Shu about the Book of Changes in Han Dynasty,and makes profits and losses on the "Nazhi theory" of Jing Fang and the "governance of the six seasons from time to time" of Yi Wei.From the order of hexagrams,Zheng Xuan’s theory of Yaochen innovates the running order of Yin and Yang in Jing Fang’s studies of the Book of Changes and Yi Wei,which changed the opposition of Yin and Yang to following of Yang and Yin.From the perspective of the position of hexagram and Yao,Zheng Xuan’s theory of Yaochen highlight the core position of Yao,changing from the corresponding time of hexagram to the theory of Yaochen,which changed the core position of hexagram in Jing Fang’s studies of the Book of Changes and Yi Wei.Thus Zheng Xuan took Yao as the source of the change of the Book of Changes,which enriched the change theory of the Book of Changes.