The title track here represents just about the peak of Miles’ second great quintet. With Miles and Wayne Shorter playing a weary melody at a rather slow tempo, Tony Williams punctuates the song with sudden, quick fills and accents that seem to transform the entire song into a sketch of something great and elusive, beyond the ennui suggested by the horns. Miles and Shorter mostly play the same melodic line over and over and over again, shifting registers and shifting harmonics in a way that tends toward the dissonant and existential. Herbie Hancock‘s accompaniment is perfectly spare, appearing as if out of nowhere to play exactly and only the right notes. Ron Carter on bass is active and unmoored from any sort of role as a mere timekeeper in the rhythm section. There is a looseness to the performance, clearly influenced by the free jazz movement, but still bounded and organized. Most significantly, the structure mediates the interactions of the players so that the lines between open (free) improvisation and pre-written composition blur, and all the players seem to have an equal — if still varied — role. It’s a magnificent recording. I have never completely warmed up to the album as a whole, mostly because of the songwriting featured in the latter part of the album, but I can’t deny this is a great offering. To get a complete picture of Miles and his many groups, you’ll need investigate Nefertiti at some point, but Miles Smiles and E.S.P. should perhaps be investigated first.