Teach Immediately What You Learn to Build Real Expertise

Learning becomes mastery when you teach it. Eben has built 2-3 courses every year for 20 years — not because he had something to sell, but because teaching forces you to construct real mental models, organize information into transferable packages, and identify the gaps in your own understanding. It's not what you've learned that counts — it's what you've taught. When you explain something to someone else, you discover what you actually know versus what you merely recognize. The teaching process accelerates the learning loop dramatically. This principle applies equally to entrepreneurs studying business skills and to knowledge creators building products: the fastest path to genuine expertise is to teach what you're learning as you learn it, iterating based on the questions and gaps your students reveal.