Error is discipline through which we advance.

Mistakes are usually treated as interruptions to progress. They are closer to the mechanism of it, because every error delivers precise information about where your understanding or skill stops. The discipline lies in actually using that information instead of hiding the mistake, explaining it away, or simply feeling bad. Handled that way, each error narrows the gap a little.

After your next mistake, once the embarrassment has settled, write one sentence about what it showed you and one about what you would do differently. Keep these notes in one place. Over time they become a more personal teacher than any manual.