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.

I don't pretend to understand him, but I can enjoy him as a poet and comedian. I liked the idea of the eternal return. Sometimes I think that being on tour year after year is an eternal return; you play a certain club in Copenhagen and then ten years later you are back again, traveling the same roads year after year.

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.

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.

Writing a song is a long road. Or it can be.

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.