With my recovery programme, I have to do a daily inventory of how my day has been. I am terribly dyslexic and have attention deficit disorder, so I have to carry a tape recorder everywhere I go.

I kept hearing that metal is dead and Ozzy's dead and people that like Ozzy are dead. I have never had an empty seat. I've always sold out, so who's saying it's all over?

But the thing with us was, we didn’t really need anyone to make us world famous – we were already halfway there.

I have a saying. 'Never judge a book by its cover'. I say that because I don't even know who Ozzy is. I wake up a new person every day.

Being sober on a bus is, like, totally different than being drunk on a bus.

MTV made a huge impact. Heavy rotation took you from selling 1m albums to 20m albums, and that meant a lot of dough.

The rest of the guys in Sabbath became boring old farts, and there I was, this crazy guy, still into wrecking hotel rooms and having parties.