I guess I could be singing about Superman, or about Zarathustra coming down from the mountain, but in my mind I was singing about Julian Assange. I wish I could say that Nietzsche inspired my lyrics but all I can honestly say is I was inspired by the graphic design of these '70s paperback covers for Beyond Good & Evil and The Birth of Tragedy and The Gay Science.

It's a scary question for a musician or songwriter today - what does the future hold? It is a strange time in the music business too; it feels like we are all in some kind of transitional period, stuck between old technology and new.

One of the nice things about being in a band is that you depend on each other for ideas, so it's not all up to me to do everything myself. There's always that fear that you'll run out of stuff. The most difficult part for me is writing lyrics, and that starts to get difficult after you've written, like, 120 songs.

Don't be a rock star. I've seen people around me have their lives destroyed by drugs. It just depends on what kind of person you are. Like, some people have a "go" button and a "stop" button, and some people just have the "go" button, meaning that they take drugs and just take more, and more, and more. It could be 6 in the morning and they'll say, "Okay, I have to get more now." I'm not that kind of person.

Writing songs does not get any easier, and that might be because I am harder on myself than I was twenty years ago. Hopefully, as we grow older and change, there are fresh topics, new perspectives, or at least there should be.

I am interested in politics but have stayed away from writing overtly political songs, or message songs, because I find it difficult to discuss politics intelligently in a 4-minute song. But I am finding there are ways to get bits and pieces of political thought across without preaching that the people have the power or we shall not be moved. Of course these sentiments have their place too - I'm not knocking Phil Ochs - but that's a different kind of music, songs to play at rallies, not to achieve a state of bliss.

They didn't teach Nietzsche in the philosophy department at Harvard; philosophy there was strictly analytical stuff and the poetic ramblings of Nietzsche did not belong. And see - you are teaching it in a literature class - so they must have been right.