This driving need is what is so defining of her and is, in a sense, what makes her a palindrome, ... Loosely, metaphorically speaking, a palindrome describes that part of ourselves that is immutable and that resists, so that for all the metamorphoses, physical and otherwise, that we see over the course of the film, the character remains a constant.
What I tried to do, as best I could, was keep a kind of balancing act in motion, ... I have my prejudices and politics and so-forth, but if I was going to err, I wanted to err in favor of the Christian conservatives, since it's not the world that I come from. Keeping this balancing act was essential for me, since the point is that the film is not trying to convert one... but rather for the audience to have to examine some of their own preconceptions about whichever position one is taking.