Specifically, "Meditations". It has taken a long time for me to really be able to appreciate some of Trane's music from his later period. I've come to hear that the music on this recording, while being very abstract, contains some of the most intensely beautiful melodies anywhere on record.
Consider the following from the "Love" movement:
What really touches me is the relatively simple way that Trane treats the melody (starting around 2:20). The simple, almost child-like melody with increasingly dark and shifting colors never fails to grab at my heart as does the absolute conviction that Trane plays with.