If I have any advantage, maybe, as a writer, it is that I don't think I'm very interesting. I mean, beginning a novel with the last sentence is a pretty plodding way to spend your life.
The concept is basically; that the pieces we know and love are made up of scales, arpeggios, and the like.
Sometimes there are two very opposite directions, and we go with the stronger one at the end. It's an impulse thing, like, 'Oh, I love both so much, but it's got to be one or the other because the two don't work together.'