The joy and ease of Bob Marley's music is a message to all of us that can't be understated - except it can be, by Marley himself. He gets very little credit for the unassuming style of his music, never aggressively pushing a laid-back attitude, which you'd be surprised how many reggae songs do.

Marley's staggered delivery in this song, in the chorus especially, is divine. So much of it is just behind the beat, lagging perpetually, catching up when it matters with a smile.

The best, best moment, is the "vocal solo" when all instruments cut out except that fantastic percussion section, holding strong an upbeat quarter note jiggle. Bob Marley stands in there and flies into his upper range, one of the best voices ever given to humanity. A hidden sophistication lies in the snips of backing instruments that enter, alternating from short three-note hits to even more detail-oriented doubled, six-note hits with sweet funk ghost notes at their center. If over-performed, these hits would come across as contrived, but this band is too cool for that, and they chime in at a gentle mezzo.

This sensitive ear separates Bob Marley's groups from much other rawer reggae - and most other music in general.

The hidden care that they take, ironically, creates a work of seeming effortless peace, allowing us to drift away.