I think that you need to make sure, as a parent, that you child is not acting arrogant. Think of a couple good movies that demonstrate how arrogance ruins people, and tell him that you would like to watch the movies with him and talk to him about them. If not you, who will teach him? If kids think this, than it is most likely true. Be there for him, like a friend. Watch the way he behaves carefully. Make sure he knows that he should be confident, but that being overly-confident isn't healthy.