The skills that stick are the ones you pull in
A central idea in The Value Shift is that you can't order people to be curious — but you can create the conditions where curiosity grows. The most reliable of those conditions is letting people learn on the work they actually care about. When a new skill solves a problem that's been nagging you all week, you keep using it. When it's pushed on you out of context, it slips away the moment the session ends.
Mentoring is the “pulled-in” path made deliberate. Because every session starts from what you want to improve, the skills you build are already attached to something that matters to you — which is exactly why they last.