A lot of people, especially this one psychoanalyst guy they have here, keeps asking me if I'm going apply myself when I go back to school next September

A lot of people, especially this one psychoanalyst guy they have here, keeps asking me if I'm going apply myself when I go back to school next September. It's such a stupid question, in my opinion. I mean how do you know what you're going to do till you do it? The answer is, you don't. I think I am, but how do I know? I swear it's a stupid question.

Jerome David Salinger, The Catcher in the Rye