I think there are shades of political songs; some are more subtle and can be more effective for being subtle, for being more metaphorical. I've written a lot of songs like that, where it's not really clear if it's a war song or a relationship song. The metaphor can be the most powerful thing of all, but sometimes you have to speak more clearly to more people, and I think this is one of those times.

If you're up there performing a song for the first time, it's as if you're hearing it through their ears. You become acutely self-conscious of the song in performance, so that's a good thing before recording. But I like to have some surprises for the audience; I don't want the audience to know everything that's going to be on the record, because these days, with the Internet, people become avid collectors of pre-knowledge.

There is in fact a controversy over Darwin's theory. Clearly both theories have religious implications. But this is not about God.

People want to hear about the extremes of human nature. They want things that are larger than their own lives, and more romantic, and not necessarily of their own experiences.

As the writer, you're always a presence in the song. If you get close to what human beings are like, you're writing about common experience. We all do much the same things, so if you nail somebody, then you've also nailed yourself.

I don't really know how writing process happens, how these songs are arrived at. One of the things I like about the writing process is, I don't necessarily know where it's going, and even if I think I know where it's going, it'll turn out different. I find that exciting and rewarding.

All audiences should be slightly off balance.