I don't go walking into things blind.

But to put out a greatest hits on one CD was totally impossible, I just couldn't do it. The best compromise was to put out two CDs - Early Days - which is what it is - and Latter Days.

I can tell how far I ought to be going, I know how to get there, all I've got to do is keep playing.

I remember one particular occasion when I hadn't played a solo for, quite literally, a couple of months. And I was asked to play a solo on a rock & roll thing. I played it and felt that what I'd done was absolute crap. I was so disgusted with myself that I made my mind up that I had to get out of it. It was messing me right up.

The only term I won't accept is "genius."

There was no working title for the album. The record-jacket designer said `When I think of the group, I always think of power and force. There's a definite presence there.' That was it. He wanted to call it `Obelisk'. To me, it was more important what was behind the obelisk. The cover is very tongue-in-cheek, to be quite honest. Sort of a joke on 2001. I think it's quite amusing.

The idea of a hypnotic riff as the prime mover of a piece of music has been around for a long time, whether you're talking about the Delta blues or music from Middle Eastern and African cultures.