🧠 Master Complex Ideas with the Feynman Technique


Want to read (or listen to) this newsletter in your browser? Click here.

šŸ’” The Big Idea: Simplify Your Ideas to Get More Out of Them.

Richard Feynman was not only a Nobel-prize-winning physicist, he was also called ā€œThe Great Explainerā€ for his ability to break down complicated ideas and communicate them to others in a simple, intuitive way.

He’s also the inventor of The Feynman Technique, a method for developing a deep understanding of complex topics that has a lot of PKM parallels for curious sensemakers.

In this newsletter, I want to introduce you to the Feynman Technique and show you what you can learn from it to help you gain clarity on complex topics and turn your ideas into action.

What is the Feynman Technique?

There are four steps to the Feinman Technique:

  1. Identify Your Topic
  2. Teach it to a Child
  3. Identify Knowledge Gaps
  4. Simplify

The reason this technique is so effective is that it helps you go from a passive consumer of information to an active creator of knowledge.

It’s the difference between feeling overwhelmed by all the information sitting in your digital filing cabinet and being able to create consistently by never running out of ideas.

ā€œThe first principle is that you must not fool yourself and you are the easiest person to fool.ā€ – Richard Feynman

Let’s break this down step by step.

Step 1: Identify Your Topic

The first step is to get specific about what you’re trying to learn. Start with a blank page (or a new note) and simply start writing down everything you know about the topic.

There’s a saying that ā€œThoughts disentangle themselves through lips and pencil tips.ā€ I would also add clicky keyboards.

Codifying your thoughts is the first step in turning information into revelation.

Step 2: Teach it to a Child

The second step is to attempt to explain the concept in plain language. Imagine you’re explaining it to a 12-year-old: how would you describe a complex topic in simple terms?

If you’ve not tried this before, you might be surprised at how difficult this can be. It’s easy to describe something in complex terms, but only someone who really understands something can make it simple.

By distilling the idea down to its essence, you further your understanding of the topic.

Step 3: Identify Your Knowledge Gaps

The third step is where you identify where your explanation is unclear. Reviewing things like this will expose areas where you don’t understand things as well as you think you do.

This will help identify any weak sections where you use unnecessarily complex language.

Step 4: Simplify

The fourth step is to distill the idea down even further. Go back and rewrite it again in even simpler language, until it can be understood by a complete novice.

ā€œIf you can’t explain it simply, you don’t understand it well enough.ā€ - Albert Einstein

When you realize where something could be improved, rewrite it.

How the Feynman Technique Influences My PKM System

Since I’m no longer a student, I don’t have a need to master material like when I was studying for a test. As a result, I don't follow the four steps of the Feynman Technique in order to master material very often.

But I do still implement pieces of this every day in my PKM system.

First, whenever I feel like I’m having trouble wrapping my head around a topic, I’ll open up a new note and just start writing what I think. I look for the mental squeeze point (where I start to feel stressed about a lack of clarity), then force myself to sit down and just start writing.

I pull in bits and pieces of things on my mental workbench, and I create my own ā€œmapā€ of the topic. I connect things and force myself to interject my own opinion notes, usually inside of colored callouts.

Here’s an example from my map on the topic of habits:

Second, I force myself to distill the information from books that I read into three-sentence summaries. It’s impossible to encapsulate everything from a 200-page book into a couple of sentences, but that’s kind of the point.

For example, here’s my summary of Atomic Habits by James Clear:

The key is to not just collect a bunch of technical information. Instead, try to wring more out of the notes and ideas you already have.

The Bottom Line: If You Want to Understand Something Well, Try to Explain it Simply.

By attempting to explain something at a 5th-grade level, you’ll quickly see where you have a good understanding of the concept and where your problem areas are. Knowing where the gaps are in your understanding makes it easy to seek new explanations and can lead to breakthroughs in understanding when attempting to solve difficult problems.

— Mike

Practical PKM

A weekly newsletter where I help people apply values-based productivity principles and systems for personal growth, primarily using Obsidian. Subscribe if you want to make more of your notes and ideas.

Read more from Practical PKM

Prefer to read this newsletter in your browser? Click here. šŸ’” The Big Idea: Reflections on a Bestselling Author’s Rules for Reading in 2026. Ryan Holiday is kind of a reading/writing hero of mine. I’ve long been fascinated by his note-card based writing process, and I have a dream to someday run a bookstore like he does with The Painted Porch. Basically, I want to be like Ryan when I grow up (minus the stoicism). Recently, he published his 31 reading Rules for 2026. While I generally agree...

Prefer to read (or listen to) this newsletter in your browser? Click here. šŸ’” The Big Idea: Our Values and Our Technology are Permanently Linked Whether we like it or not, our technology use reflects our values. And our ā€œdigital footprintsā€ consist of not just the data platforms collect about us, but also the trail of attention and choices we leave behind us every single day. This can be uncomfortable to acknowledge. We’re really good at creating narratives about who we think we are and how we...

Prefer to read (or listen to) this newsletter in your browser? Click here. šŸ’” The Big Idea: Daily Questions + DataviewJS = šŸ˜ I’ve been journaling in Obsidian ever since I first started using the app over 5 years ago. The Daily Notes make it perfect for this, though I’ve crafted my own workflows using a method called Daily Questions that measure my intentions rather than the outcomes. I explain the whole process here, but the short version is this: I have a Shortcut that prompts me for a score...