13世纪北中国的程朱学与许衡的思想
Xu Heng's Thought and the Learning of Cheng-Zhu in the 13th Century North China

青年许衡一边重视到《周易》王弼注所说“为自然”概念的价值，一边反省着十三世纪北中国社会面对的有些困难,痛感到这些道家的概念有必要更新。正是被此自觉所推动，他在阅读理学书的时候得以“默契”程朱学的意义。但是，为了构筑可以改革社会的思想而想要完全消化程朱学的话，此“默契”之后，直到《读易私言》完成的七年余的时间还是必要的。
While young Xu Heng made a point of “unconditioned spontaneity” thought which was especially stated in Wang Bi s commentary on the Change, he was reflecting on some difficulties with which the society of the 13th century North China was confronted, and held the necessity to evolve this Taoistic concept. Such a desire to reform the contemporary society provoked him into reading some books of Neo-Confucianism, he realized the spirit of the learning of Cheng Yi and Zhu Xi. But it was necessary to him for the term of more than seven years. He had spent the time in accomplishing a philosophical essay on the Change named Du-Yi Si-Yan, and finally accepted the learning of Cheng-Zhu as the theory of social renovation.