This view contains two meanings: first, we don't have to rack our brains to think about this idea that we can't understand at this stage, because it has little to do with us or is difficult to understand at our current level; Second, the ideas that touch us are mostly related to us. We need to think deeply about such ideas, instead of letting them pass by in our minds.
This view is consistent with the disassembly of calligraphy introduced by teacher Zhao Zhou in "This is enough to read". They all advocate applying what they have learned to maximize the value and efficiency of reading.
I want to make some additions to this view. When we read a book for the first time, in order not to reduce the reading experience, we can mark the points that touched us first, and then think back after reading it. This will not affect reading, but also ensure that you correctly understand the views in the book. It's like talking to people. Listen to what others say first, and then express your own views.