If you can't explain it simply, you don't understand it well enough. — Albert Einstein

If you can't explain it simply, you don't understand it well enough.

Author: Albert Einstein

Insight: We've all been in that moment: someone asks us to explain something we thought we knew, and suddenly we're stumbling through jargon, backtracking, throwing in unnecessary details. That discomfort is actually useful information. It's your brain telling you that you've memorized the surface but haven't really digested the thing. This matters because it's easy to mistake fluency for understanding. You can read about a concept, nod along, feel like you "get it," and then discover you can't actually explain it to your kid or a friend without sounding confused. That gap between looking smart and actually understanding is where most of us live more than we'd like to admit. The cure isn't more reading—it's trying to teach someone else, or at minimum, explaining it to yourself out loud. The real payoff here is selfish: forcing yourself to explain things simply is actually how you learn faster and remember longer. It's the difference between information sliding through your brain and actually taking root. So the next time you can't find simple words for something, don't feel bad. You've just identified exactly what needs more thinking. That's progress.

Source: Out Of My Later Years, p. 101, 1950