“No more Ozzy Osbourne. Now we’ve got Ronnie James Dio. What a voice! He had an operatic quality to him, along with an anger and a gnash.

“I love a song that starts off in a quiet place and goes to complete doom. The track is a warning that really horrible stuff is on its way. The transition from Ronnie’s falsetto – which I don’t think we’ve ever heard before – to the acoustic guitar is amazing. And I don’t believe I’ve ever heard Tony Iommi play an acoustic before, either. The guitar is soft and pretty, kind of squawky and imperfectly played.

“The riff and the slow tempo give off a ‘world is ending’ feel. You could hear this song in your head as you’re marching onto a football field or in your basement with your stupid friends... as you’re nodding slowly and considering the finality of civilization.”