4. Combine Knowledge Trees
One way to imagine a book is like a knowledge tree with a few fundamental concepts forming the trunk and the details forming the branches. You can learn more and improve reading comprehension by “linking branches” and integrating your current book with other knowledge trees.
For example:
While reading The Tell-Tale Brainby neuroscientist V.S. Ramachandran, I discovered that one of his key points connected to a previous idea I learned from social work researcher Brené Brown.
In my notes for The Subtle Art of Not Giving a F*ck, I noted how Mark Manson’s idea of “killing yourself” overlaps with Paul Graham’s essay on keeping your identity small.
As I read Mastery by George Leonard, I realized that while this book was about the process of improvement, it also shed some light on the connection between genetics and performance.
I added each insight to my notes for that particular book.
Connections like these help you remember what you read by “hooking” new information onto concepts and ideas you already understand. As Charlie Munger says, “If you get into the mental habit of relating what you’re reading to the basic structure of the underlying ideas being demonstrated, you gradually accumulate some wisdom.”
When you read something that reminds you of another topic or immediately sparks a connection or idea, don’t allow that thought to come and go without notice. Write about what you’ve learned and how it connects to other ideas.
5. Write a Short Summary
As soon as I finish a book, I challenge myself to summarize the entire text in just three sentences. This constraint is just a game, of course, but it forces me to consider what was really important about the book.
Some questions I consider when summarizing a book include:
In many cases, I find that I can usually get just as much useful information from reading my one-paragraph summary and reviewing my notes as I would if I read the entire book again.
If you find yourself stuck or if you see that there are holes in your understanding, review your notes or go back to the text and try again. Keep writing it out until you have a good handle on the main ideas and feel confident in your explanation.
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