Sometimes we pee on each other before we go on stage.

My life has been many examples of shortsighted goals that I thought would fix things. You know, if there's something broken inside me, if there's a hole in there, I thought: If I could just write a good song someday, then I'd be OK. You know, if I could just be on stage in front of people I'd never seen before and be validated by them.

Being a rock & roll star has become as legitimate a career option as being an astronaut or a policeman or a fireman.

When David Fincher called me up a few years ago and said, 'Hey, I'd like you to score this film 'The Social Network,' I said, 'I'm flattered, but I really don't have any real experience scoring films, and I'd rather not screw it up on a high-profile project. And I like you and I don't want to compromise our friendship.'

I thought I'd reached the bottom a few times, but then I'd realise there was another 30 floors of despair below that.

I foolishly thought that if I just 'made it' then everything would be okay. And everything wasn't okay.