Therefore, there are two kinds of knowledge: one is that is already in the textbook; the other is that putting undue emphasis on perceptual and partial knowledge.Both the two kinds of knowledge are lopsided.

• 这样看来，有两种不完全的知识，一种是现成书本上的知识，一种是偏于感性和局部的知识，这两者都有片面性。