Learning is any change in a system that produces a more or less permanent change in its capacity for adapting... — Herbert A. Simon

Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.

Author: Herbert A. Simon

Insight: Most of us think of learning as something that happens in classrooms, but Simon's definition suggests it's actually happening all the time—whenever we change in ways that make us better (or sometimes worse) at handling what comes next. Your brain learns that coffee at 3pm keeps you wired. Your body learns that you can't sprint like you did at twenty. Your nervous system learns to flinch before you touch a hot stove. These aren't grand intellectual moments, but they're all learning, because they've genuinely altered your capacity to navigate reality. The tricky part is that word "permanent." Learning doesn't mean you never forget or regress—it means the change sticks around long enough to matter. That's why cramming for an exam and then forgetting everything isn't quite the same as learning something that actually reshapes how you operate. Real learning rewires something durable. What makes this especially useful is how it removes the mystique. You don't need formal instruction to learn. You need an environment that challenges you, feedback about whether you're adapting successfully, and enough time for the change to take root. That happens during a difficult conversation as much as during a class. It happens when you fail and adjust, when you notice a pattern, when you finally understand why something you've been doing isn't working. Learning isn't special—it's what happens when reality meets a system that pays attention.