"...Everything has been useful. The coaching, the mentoring, the master classes… but maybe it’s more how you do things than what you do which is the learning for me. As you told me during your last session: mastery comes with being, not doing, and it is true inspiration to work with you, listen to you guide a masterclass or a course, or be mentored by you"
Amabile and Kramer’s The Progress Principle has fascinating research
This is about progress in the session and over time… check out the blog
And here is Claire talking about mastery 
