What is the author's tone in Arnold: The Education of a Bodybuilder by Arnold Schwarzenegger?

The tone of the book is an almost-lyrical apologia for bodybuilding in general and for Arnold Schwarzenegger's dedication to becoming the world's best in the sport. The reader follows the accounts of his early development and how he becomes addicted to the sport of bodybuilding and is occasionally given insight into his personality as Arnold stands back a little and tries to objectively analyze the course of his life and his motivation for the unrelenting regime of physical training, which he undertakes.

Arnold's conviction and sincerity in his beliefs and chosen career lead the reader to join with him in the setbacks and challenges he has to overcome to achieve his ultimate goal of becoming the world's champion bodybuilder.