This happens when inner thoughts or a written text’s general idea cannot fully reflect the actual state of things, and when diction cannot fully express inner thoughts. It is a description and analysis of the psychology of writing by Lu Ji (261-303), of the Western Jin Dynasties, in his literary theoretic work, “The Art of Writing.” Specifically, inner thoughts or creative ideas triggered by external things can be diverse yet ambiguous and the author grasps only some of these. Language, too, has difficulty in expressing them fully, not to mention all the implications triggered by or related to external things. In the domain of everyday human cognition and practice, language can, by and large, clearly record the subject’s thoughts and express his wishes with regard to external things. But in literary creation, words often fail to do so. This also explains why literary interpretation enjoys greater latitude than purely academic interpretation. Lu Ji revealed this essential characteristic of literary creation and reception, thus promoting the development of literature under its own standards.