Wow, the amazon search feature is amazing... After nearly 8 years of wondering, i finally know that the quote (which erin sent me in an email once, and of which meg once said, "yes, if words could describe erin these they would be) "I don't want realism. I want magic! Yes, yes, magic! ... I don't tell the truth, I tell what ought to be truth," is from a streetcar named desire.

Though it turns out you can find it in google too, so I had no excuse.