You can't overthink the music. Mood and intensity can't be manufactured. The blues isn't about structure; it's what you bring to it. The spontaneity of capturing a specific moment is what drives it.

You never knew what was going to happen in concert. It was a really exciting prospect to go onstage, and you can hear that in the live recordings ... wherever we were and whatever year it was, we always went onstage determined to do our best.

I'm just looking for an angel with a broken wing.

I feel Aleister Crowley is a misunderstood genius of the 20th century. Because his whole thing was liberation of the person, of the entity, and that restrictions would foul you up, lead to frustration which leads to violence, crime, mental breakdown, depending on what sort of makeup you have underneath. The further this age we're in now gets into technology and alienation, a lot of the points he's made seem to manifest themselves all down the line.

A lot of people can't be on their own. They get frightened. Isolation doesn't bother me at all. It gives me a sense of security.

There is no way I would play guitar like a tour de force like I did in Led Zeppelin. John Bonham, phenomenal drummer, young man with his technique, but do you think he would ever have the opportunity to play like that in another band? Of course he hadn't.

Just because you play bass, doesn't mean you have no presence.