Into the wild #1

What do characters emotions and behaviors reveal about personality and psychological states?
In chapters 1-3, the fact that he isn't scared to go into the wild shows he is fearless. He will accept what happens but is confident in his abilities to survive. "He was determined. Real gung ho. The word that comes to mind is excited." He also might have been foolish not to be more prepared.
In chapters 4-6, he questions whether he is the same person who started out on the journey or not. The fact that he isn't eating enough and has lost 25 pounds, yet his spirit is still soaring shows that he is so concerned with external things that he fails to take care of himself internally. Part of his personality is not worrying about himself, he assumes that everything will be all taken care of for him somehow.
In chapters 7-9, when he refuses to forget about his father's past, it shows that he holds a grudge. He can't let it go. When most other people make mistakes he lets it go, but he holds his father to a much higher standard than everyone else. This could be because he was so close to his father that he just excepted better from him and when he learned the truth it shocked him so badly he couldn't forget it.