I found it on vinyl and listened to the first hour of it about 8 years ago and wrote it off as an example of what I don't like about Philip Glass, then I pulled it out and listened to it again last night and it was exponentially better than I remembered; now I wish I hadn't sold my Akhenaten LPs.
Anyhow, this video goes really well with any part of side 1 track 2, "Train"