Richard Feynman wasn’t just a Nobel Prize-winning physicist - he was one of history’s greatest learners and teachers. His technique for understanding complex topics is deceptively simple yet profoundly effective.

The Core Principle

“If you can’t explain it simply, you don’t understand it well enough.”

The Feynman Technique exposes the gaps in your knowledge by forcing you to teach what you think you know.

The Four Steps

Step 1: Choose a Concept

Write the concept at the top of a blank page. Be specific.

Charlie Munger said: “80 or 90 important models will carry about 90% of the freight in making you a worldly-wise person.” Here are the essential mental models that will upgrade your thinking.

What Are Mental Models?

Mental models are simplified representations of how the world works. They’re the thinking tools that help you understand life, make decisions, and solve problems.

Think of them as apps for your brain - each one helps you process certain types of information more effectively.