Neil Finn discussed his song writing in an interview with Spinner UK: "I have a tendency to chip away at songs. I love that process of keeping something up in the air as long as possible. I think you end up with a better song at the end. There's a chance you overcook them, but I've got used to the idea that a great song is part inspiration, part loving force of will, determination and struggle.
It's a craft, but I've always thought of craft as a self-satisfied word. To me, it's far more primitive than that. The moments of greatness are nothing to do with craft, it's do with instinct. A good line might pop into your head when you've been looking for a second verse, and you've have a flash of inspiration. You wouldn't get there without the struggle, so it's about leaving yourself open to ideas.
I can talk about this forever, but writing songs will always be a mystery. If I knew how I wrote a classic song, I would do it every day, and I can't. Luckily for me, not many other people know how to do it either."