The thing you already know

Yesterday was about showing instead of announcing. Today, the obstacle behind the announcing: the quiet certainty that you've already got this part figured out.

A driver who's run the same route for ten years stops hearing the dispatcher's new instructions, because he knows the roads. A nurse who's done a thousand of these stops reading the updated protocol, because she's done a thousand of these. Then the road closes, or the protocol changed for a reason, and the experience that should have helped is exactly what shut the door.

Epictetus asked his students what the very first job of learning is, and answered it himself: "To get rid of thinking that one knows; for it is impossible to get a man to begin to learn that which he thinks he knows" (Discourses 2.17, Oldfather). Not the things you admit you don't understand — those you'll learn fine. It's the things you're sure of that go untested for years.

That's the teachable move this week made concrete: the danger isn't ignorance you're aware of. It's the competence you've stopped questioning.