This scene from the movie Pig is the best thing I've seen all year.
Derek, why do you care about these people? They don't care about you, none of them. They don't even know you, because you haven't shown them.
Every day you wake up, and there'll be less of you. You live your life for them, and they don't even see you. You don't even see yourself... We don't get a lot of things to really care about. - Nicolas Cage, Pig