Perspective in The Catcher in the Rye

Social Action Question: Whose Perspective is Missing?
       
         I just started reading The Catcher in the Rye by J.D. Salinger. So far in the book, Holden has been kicked out of his boarding school and is visiting his former history teacher, Mr. Spencer, that he really likes. In the conversation, Mr. Spencer asks him why he failed history, and Holden replies with an answer that he thinks Mr. Spencer would like, but one that he doesn't give much thought to. Mr. Spencer also asks Holden what he would do in his place, as a teacher. Holden just dismisses it, acting careless. In this conversation, and throughout the first few pages of the book, I feel that it's all through Holden's naive, careless eyes. In this situation, I think that Mr. Spencer's perspective is missing. 
        First of all, I think a reason that Mr. Spencer's point of view is missing is because Holden is not letting it come through to him. Mr. Spencer has wise words to tell, but Holden is just focused on little things, like how uncomfortable and awkward he feels talking with him. Holden is dismissing Mr. Spencer's perspective on things as an older man, and his advice. I think J.D. Salinger did this on purpose. We get a glimpse into how Holden will be in the rest of the book. He sees things with one side, and he doesn't notice the true importance of mentoring and guidance. By not having Holden listen and take Mr. Spencer's advice, we get the sense of who is Holden is and who he's going to be. We see that the rest of the story is going to be told from a teenager's point of view. Holden's lack of listening is part of his personality.
          This situation can be compared to the world. Holden is like a young child who is supposed to be listening to their parent, or like a bored student who is supposed to learn something from an older person or mentor. He doesn't pay attention to what he can learn. Mr. Spencer is a big archetype in the book, and gives good constructive criticism on how Holden can improve. It's like in life, when you wish that you listened to someone in the past  because now you need the information they were giving you. A message here is that we should listen to the advice we are given, because it may give us knowledge to move forward. Who knows, maybe later in the book Holden will start to appreciate 'old' Spencer, and the knowledge and thought he has given to him. Holden had the chance to do well at school, but he didn't. Now he has the chance to get more help on how to do better in the future from a man he looks up to, but he is dismissing the opportunity by only looking at the conversation from one naive side.
          As the readers, we are starting to get an idea of Holden at the beginning of the book. We know that Holden is a reluctant-to-learn teenager, and that he looks at the world with only his two individual eyes. I think J.D. Salinger purposefully left out the mentor point of view of Mr. Spencer by having Holden not pay attention to his bright words. I think this was because we start to see Holden as an unwilling character, and that gives him more of a chance to learn a big lesson at the end. It gives the readers something to think about as we go forward into the book.