The sixth chapter of the book is about what mastery means, and all the other five chapters are about how to get there. What mastery means is you've reached a level in your field. And i want to make it clear from the beginning that i am not prejudiced about what field you are in. All levels of human endeavor have a level where you can reach mastery. It's kind of a feeling that's so superior, that so amazing, that it almost eludes language.