The principles contained in "Two Poems on Observing Books" belong to the category of aesthetic principles. The reasoning angle of one of the poems is to appreciate beauty, and the reasoning angle of the second poem is to create beauty. This aesthetic principle is with There is a certain degree of universality. For example: if readers put aside the description object of the poem itself, they can completely extend this principle. For example, if "book" is understood as "book", and the content of the book does not generally include medical books, philosophy books, history books, science and technology books, etc., but only literary content such as poetry, music, prose, etc. that embodies literature and art. In terms of beauty, it can also be considered that "source of living water" expresses "inexhaustible literary thoughts", while "a night of spring tide" expresses "blooming literary thoughts" and so on.