I wasn't in quite the right mood for this book (I've already been chewing on a lot of these ideas, and I really don't get into dance, which made up a good bit of the mastery discussion and took me back to a very uncomfortable ADF I attended in the early aughts), but I appreciate what Lewis is doing here. I also really like the concept of "nimble grit," the idea that persistence is incredibly valuable, but so is knowing when to pivot.