It sounds like something played on a music box, with a little ice skater dancing around the perimeter when the music box opens. The lyrics are so wistful. So regretful.
My Mum used to listen to Joni Mitchell when I was a kid. I never appreciated the beauty of this song, or any of her music. And despite watching Love Actually 879 times, it was actually only when I heard Angus Stone's version of River that I realised its magic, and I then revisited Joni's.
Sometimes, when I hear classic songs for the first time, I realise I should have heard them years ago, and feel guilty for not giving the great music the attention it (and I) deserved. Hell, what was I thinking when I bought Holly Valance's Kiss Kiss on CD when I should have been listening to Joni.
Like Alanis Morissette, I need to play your [Mum's] Joni someday.