You see only as much as you know
The book reworks a Joseon scholar's line into a viewing rule: if you love something you come to know it, and once you know it you truly see it, and what you see is no longer what it was before. A pagoda or temple hall looks like nothing to an uninformed eye. Supplying specific knowledge, such as proportion, date, or the builder's intent, changes what the eye registers on the same object.