一、前言《周易·乾卦》:“乾,元亨利贞。”《文言》解释说:“元者,善之长也;亨者,嘉之会也;利者,义之和也;贞者,事之干也。……君子行此四德者,故曰:乾,元亨利贞。”是谓《乾卦》四德。按:卦具四德,不必专于《乾卦》。《左传》鲁穆姜以“元亨利贞”为《随》的四德。 First, the preface, “Book of Changes and Gan Gua”: “dry, Yuan Henry Li Zhen.” “Classical” explains: “Yuan, good long also; Heng who, Jia will also; profit, justice and also; , The matter of dry also ... ... gentlemen line these four virtues, so said: dry, Yuan Henry Li Zhen. ”Is the“ dry Gua ”four virtues. Press: Gua with four virtues, do not have to specialize in “dry Gua.” “Zuo Zhuan” Lumi Mu Jiang “Yuanheng Li Zhen” as the “virtue” of the four virtues.