For his sake I'm sorry that Robert Johnson sold his soul to the devil, but for our sake and the sake of music I'm glad he did.

If one of my heroes comes to me and says, 'Do you want to work on something?' I just say, 'Yes.' I don't ask for details; I don't expect to get paid anything. I just love working with my heroes.

I've worked with all sorts of random people - everybody from Metallica to Britney Spears to Ozzy Osbourne to Michael Jackson to the Beastie Boys. I've got a really strange CV. It's interesting - I work with a lot of these disparate, different people to learn what it's like to work with random people.

For example, you can go on all the pro-life chat rooms and say you're an outraged right-wing voter and that you know that George Bush drove an ex-girlfriend to an abortion clinic and paid for her to get an abortion.Then you go to an anti-immigration website chat room and ask, "What's all this about George Bush proposing amnesty for illegal aliens?"

We hope that as a species we're capable of dealing with environmental catastrophe before it actually does collectively kill most of us.

I learned in the last few years that it's really unhappy and really unsustainable to try and base your well being on something as arbitrary as record sale and critical acclaim and the interests of the public. All of those things are so fickle. So my approach now to music is I want to make records that I love, and I hope that other people love them, then that's OK.

To paraphrase Paul from the New Testament, he has a great soliloquy about love, where he's basically saying, if I've figured out the secrets of the universe but I don't have love, figuring out the secrets of universe means nothing.