Retaining Knowledge: Reading, Taking Notes, and Second Order Thinking

Retaining Knowledge: Reading, Taking Notes, and Second Order Thinking

Introduction:
Reading is a powerful tool that can shape our interpretations of the past and influence our values. However, simply reading more books is not enough; we must strive to retain and apply the knowledge we gain from each book. In this article, we will explore seven ways to retain more from every book we read, as well as the concept of second-order thinking and the importance of understanding the reasons behind existing systems.

1. Start, Quit, and Revisit Books:
   To improve reading comprehension and retain knowledge, it is essential to choose books that can be immediately applied to our lives. By putting the ideas into action, we solidify the concepts in our minds. Additionally, reading great books multiple times allows us to uncover new insights and deepen our understanding. As Karl Popper said, "Anything worth reading is not only worth reading twice, but worth reading again and again."

2. Take Notes and Make them Searchable:
   Keeping notes while reading is crucial for retaining information. It doesn't have to be complicated; find a method that works for you. For digital note-taking, Evernote is a popular choice due to its searchability and ease of use across multiple devices. By storing your notes in a searchable format, you can easily revisit and apply ideas when needed.

3. Summarize and Explain:
   After finishing a book, challenge yourself to summarize the entire text in just three sentences. This exercise forces you to identify the main ideas and consider their practical application in your life. The Feynman Technique, named after physicist Richard Feynman, encourages explaining a book to someone who has never heard of it. This process reveals gaps in our thinking and helps us improve our understanding.

4. Second Order Thinking:
   First-order thinking focuses on immediate results, while second-order thinking considers the broader, long-term consequences of our actions. By practicing second-order thinking, we can achieve extraordinary results and gain a deeper understanding of complex situations. Recognizing when others are using second-order thinking is also valuable in decision-making.

5. The Importance of Understanding Existing Systems:
   Before making changes or removing something, it is crucial to understand the reasons behind its existence. Just as Chesterton's Fence teaches us, fences are built for a purpose, and we must ascertain that purpose before deciding to remove them. This principle applies to both physical systems and abstract ideas. People naturally care about the return on investment and won't take action if it's not beneficial to them.

6. Avoiding Uninformed Intervention:
   Intervening in systems without understanding the consequences can lead to unintended problems. Subtraction, just like addition, requires careful consideration of the potential outcomes. Robert Frost's poem "Mending Wall" reminds us to understand what we are walling in or walling out before taking action. Not understanding something does not mean it is pointless; there may be underlying reasons that we need to uncover.

7. Embracing Change and Learning from the Past:
   While it is important to question existing systems, we must not be resistant to change. Over time, things become outdated and redundant, and new perspectives can bring fresh ideas. However, we should also recognize that bad habits and decisions often arise from unfulfilled needs or limited understanding. Without knowing the reasons behind a decision, we cannot safely change it or assume it was wrong.

Conclusion:
Retaining knowledge from books requires active engagement, note-taking, and a commitment to lifelong learning. By reading great books multiple times, taking searchable notes, summarizing and explaining concepts, practicing second-order thinking, and understanding the reasons behind existing systems, we can deepen our understanding and apply valuable insights to our lives. Remember, learning one new idea won't make you a genius, but a dedication to lifelong learning can be transformative.

Actionable Advice:

1. Start implementing ideas from the books you read immediately to solidify your understanding.
2. Experiment with different note-taking methods and find one that works best for you.
3. Practice second-order thinking by considering the long-term consequences of your actions and recognizing when others are using this approach.