  urlLink Sep talks about an interesting article in his post--- which i wish i had a link to, i'd love to read it. So, without a) sumerizing what Sep already said or b) having read the article Sep discusses, i'm going to give my opinions on it.
Seems to me that I'm what Sep calls an 'extreme internalist'-- that is i believe that once we answer "what is moral," we have answered "why be moral. "-- as i would define 'morality,' as something like "what we ought to do," or "what the good actions are. " but then Susan Wolf's article poses a bit of a problem for me, where she says, as Sep paraphrases, "if you spend every waking hour working for OxFam, you're behaving less-than-admirably; you ought to take up the clarinet or read some Chekhov at least some of the time.
" Seems to me that all Susan Wolf has said is that morality doesn't require me to work for oxfam all the time, but that the Good entails some idea of self-betterment. How could this be? afterall, isn't self-betterment at the expense of others selfish? well, depends. First of all, i would say that I do have some form of right to my own stuff--the stuff that i worked hard for, myself, and earned through my labor-- and that giving up everything to help others isn't morally required.
but more than that, I don't think that Truth (capital T-- the ideal of truth) is just an instrumental good. Philosophizing and thinking about the world and metaphysics, and other 'lofty' things are good, in and of themselves, not just because they lead to my own personal betterment. So, i would agree with Susan wolf that we shouldn't always strive for complete and total altruism, but i would disagree that morality=altruism. 
