Joni Mitchell seems destined to remain in a state of permanent dissatisfaction - always knowing what she would like to do, always more depressed when it's done.

I saw rock n' roll future and its name is Bruce Springsteen.

The early Stones were adolescent rockers. They were self-conscious in an obvious and unpretentious way. And they were committed to a musical style that needed no justification because it came so naturally to them. As they grew musically the mere repetition of old rock and blues tunes became increasingly less satisfying.

'Let's Get It On' is a classic Motown single, endlessly repeatable and always enjoyable.

Bob Dylan may be the Charlie Chaplin of rock n' roll. Both men are regarded as geniuses by their entire audience. Both were proclaimed revolutionaries for their early work and subjected to exhaustive attack when later works were thought to be inferior. Both developed their art without so much as a nodding glance toward their peers.

There is something complete about Stevie Wonder, and one senses that he is not only exceptionally important today, but will continue to be for as long as he chooses.

The title song of David Bowie's 'Young Americans' is one of his handful of classics, a bizarre mixture of social comment, run-on lyric style, English pop and American soul.