Once upon a lost time in the early 1990s there was a TV play by Alan 'Beiderbecke Affair' Plater in which the lead character, a jazz club owner and musician played by the wonderful Jack Shepherd, describes this piece of music in the most beautiful and eloquent way. He says something about what it does technically, which is complicated, and rather more about it being, sort of, 'a riddle wrapped in a mystery inside an enigma', to misquote Winston Churchill; that there is something in it that is always elusive, always just ahead of you and just out of reach. There's a thematic link to the plot of the play, which centres on a daughter's search for the father (Shepherd) she didn't know she had.
No-one I've ever mentioned it to remembers this play, and there are no clips of it on YouTube.
Why am I thinking about it on a dull London Monday? I have no idea.
Thelonius Monk - 'Misterioso' (1948)