Excerpt from "Keith Jarrett - The man and the music":

In 1987, a new element began to appear in the standards concerts: occasionally a wholly improvised piece would emerge from one of the standard performances or would just happen spontaneously. These remained in one key throughout. and had no harmonic changes. This development was a kind of mirror-image of Jarrett's last solo concerts when he had played a standard tune, ‘Over the Rainbow’, as an encore. Four of the spontaneous pieces from his American tour in October 1987 were eventually released on the album Changeless, so-called because of the absence of harmonic changes. Once again. the experience of Spirits seems to inform and inspire the almost minimalist approach of these truly exquisite performances. They have a powerful organic logic which the trio instinctively understands and follows through. The playing is restrained and every note is made to count, but the conceptual grasp is superb, and a tremendous quality of feeling is projected, as if the music has a life of its own and the musicians are merely midwives at its gentle birth. Often to play more sparsely can lead to renewed creativity. Everything about this sophisticated music is eloquent and humane. and yet it is hard to relate its grace and simplicity to Keith Jarrett's impenetrable liner notes. Here he seems to be attempting to give verbal utterance to perspectives he acquired under the spell of Spirits, but only the music can speak for itself, and it does.