DK12 - Consistent Mediocrity As Seeds For Mastery

In my own practices, I've seen this process play out repeatedly: people who show up consistently over long enough periods of time seem to outlast (and even: outperform) those who show up with unsustainable intensity, overly aggressive goals, and unforgiving standards.  I've also seen the incredible results of B+ level competencies combining to form unique masteries in unique niches.  Can we apply this to a life strategy at a broader level?