When You Teach, You Learn.
When You Learn, You Teach.

A few years ago someone said something to me that rearranged how I think about learning.

I was explaining how certain people who had done me harm had actually taught me valuable lessons — patience, discipline, resilience, that kind of thing. I was mid-sentence, pleased with my own perspective, when they stopped me.

"They didn't teach you anything. You were learning from them — and there's a big difference."

One sentence. It took a way I'd been perceiving things my whole life and quietly transformed it. I'd been giving credit to people who didn't deserve any.

I'd been saying things like "they taught me patience," "they taught me discipline," the way most people do. It sounds humble. But it's not quite true. Nobody installed patience in me by being difficult. Nobody handed me resilience by letting me fail. I developed those things — slowly, imperfectly — from being around people and situations that made extraction possible. They didn't do the work. I did.

That shift matters more than it may sound like it should. If someone else is teaching you, your growth depends on a better boss, a better mentor, a better book showing up. If you're the one learning, your growth is yours to work on, starting now, with whatever's already in front of you. Same set of facts, completely different amount of agency.

But if you stop there, it curdles into something arrogant. "Nobody can teach me anything" is a short walk from "I don't need anyone." That's not the insight — that's the insight with its other half amputated.

Here's the other half: when you teach, you learn. And when you learn, you teach.

Not as a banal platitude. As a catalyst.

Try explaining something you think you understand — really explaining it, out loud, to someone who'll ask follow-up questions — and you'll find the exact spot where your understanding runs out. Feynman built a whole method around this: if you can't explain a thing simply, you don't actually have it yet, you just have its name. Teaching is the fastest way to discover which one you're holding.

And it runs the other way too. Learning isn't passive. A quality question is the act of teaching — it offers the other person a gap they didn't know they had, and now they have to think to fill it. I notice this constantly working with AI tools: the better the question I ask, the better the answer I get back, and asking a sharper question is itself something I had to learn how to do. Every exchange like that is the loop running both directions at once — I'm teaching it what I actually need, and it's teaching me where my own thinking was fuzzy.

Together, the two halves create harmony. Opposed, they create friction.

First, you stop crediting other people for work you did — it clears the false ledger.

Second, teaching and learning are one loop, not two roles — that's what keeps the clarity from turning into isolation. You don't stop needing other people. You just stop waiting for them to hand you something, and start noticing that every real exchange already runs in both directions, whether you realize it or not.

The teacher who explains something out loud can find their own gap. The student who asks a real question just made it visible.

There's no clean line between the two chairs. There's just the loop — and the only real question is whether you're paying attention to your side of it, or both.