Bod works hard to learn skills from all of the talented people around him. The Graveyard Book is definitely a novel about working and studying hard to master skills that are necessary in life. In addition to the regular subjects (you know, reading, writing, geography, the Elements and Humors…), Bod is getting all kinds of extracurricular lessons in supernatural skills Fading and Dreamwalking. He also develops strengths that are important for a budding hero, like bravery and kindness.
Bod’s biggest weakness is his lack of experience with living people; he hasn’t had enough experience to be a good judge of character. This could be dangerous for him in the real world.
Bod’s bravery is his greatest strength.