绍熙五年(1194)朱熹(1130—1200)罢免待制侍讲后,十一月归途至江西玉山县,邑宰请至县庠讲学。因学者所讲问而发明要道。程珙起而问曰:“三代以前,只是说‘中’说‘极’,至孔门答问,说著便是‘仁’,何也?”朱子答曰:“说‘中’说‘极’,令人多错会了他文义,今亦未暇一一详说。”以下从“仁”字发挥(《玉山讲义》《朱子文集》卷七十四)。可借朱子未详言“中”与“极”,然依程珙之问,可知三代以前“中”字为思想热烈讨论之点。《中说》序曰,“‘中’之为义,在《易》为二五,在《春秋》为权衡,在《书》为皇 Shaoxi five years (1194) Zhu Xi (1130-1200) to be detained after paternity, returned to Yushan County, Jiangxi Province in November, the town slaughtered to the county 庠 lectures. Because of scholars talked about and invent. Cheng said: “Three generations ago, just say ’in’ said ’very’, to the Confucian question and answer, that is, ’benevolence’, what is it?” Zhu replied: , It is a lot of mistakes will be his literary meaning, this is also not yet time to elaborate. “The following from the” benevolence “word play (” Yushan handout “” Zhu Ziwen “volume seventy-four). However, according to Cheng Kui’s question, we can see that ”Zhong“ before the third generation was the point of intense discussion of the thinking. ”Said in“ preface, ”“ in the ”righteousness, in the“ Yi ”is twenty-five, in the“ Spring and Autumn ”for the trade-off, in the“ book ”for the emperor