I guess the solo from 'Achilles Last Stand' is in the same tradition as the solo from 'Stairway to Heaven'...it is on that level to me.

You can't just find yourself doing something and not happy doing it.

If I ever really felt depressed, I would just start putting on all my old records that I played as a kid, because the whole thing that really lifted me then still lifted me during those other times. It was good medicine for me, and it still does that for me when I put something on. Isn't it wonderful that we've got all that good medicine? I think it's got to be all part of our DNA, this mass communication through music. That's what it is. It's got to be, hasn't it? Music is the one thing that has been consistently there for me. It hasn't let me down.

The beauty of the band was you never knew what was going to come out next.

I'm obsessed - not just interested, obsessed - with folk music, street music, the parallels between a country's street music and its so-called classical and intellectual music, the way certain scales have travelled right across the globe. All this ethnological and musical interaction fascinates me. Have you heard any trance music? That's the thing.

There's a very old recording maxim that goes, 'Distance makes depth.' I've used that a hell of a lot-whether it's tracking guitars or the whole band. People are used to close-miking amps, but I'd have a mic out around the back, as well, and then balance the two. Also, you shouldn't have to use EQ in the studio if the instruments sound right. You should be able to get the right tones simply with the science of microphone placement.

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.