不忘其所始，不求其所终。旧皆解“忘”如字。如郭注：“终始变化皆忘之矣，岂直逆忘其生而犹复探求死意也”。成疏：“岂直独忘其生而偏求于死邪”？意皆云既忘其生复不求于死。即以上句为肯定语下句为否定语，与原文“不忘”，“不求”皆否定义不协。宣颖注：“知生之源，任 Do not forget the beginning, do not seek its end. Old Jie solution “forget” as the word. Such as Guo Note: “The beginning of the changes are forgotten, Qizhi forget their lives and continue to search for death also.” Cheng Shu: “Qi straightforward to forget their lives and prefer evil”? Yi Jie Yun both forget their life and death do not seek death. That the above sentence is affirmative phrase is negative, with the original “do not forget”, “do not seek” whether the definition of non-cooperation. Xuan Ying Note: "The source of students, Ren