First time I heard this song, I laughed and cried, tears of joy at the sheer beauty of it all.
It reminds me of "Feel So Low" from Porcupine Tree, in that it's a lyrically-depressing song following a crushing epic song, and is an unusual way to close such a heavy album.
The bridge after the keyboard solo is just epic, and I love when James goes up the octave in the last chorus! This is quite possibly one of the best ballads DT have ever written.
However, I have gotten to thinking about if they would ever play it live, and it would be REALLY hard to place this song in the set. How can you follow this song? You really can't... but would DT really close a show with this? The band known for epic-length show-closers? Then again, it's time for a change and it's quite possible that they could close a concert with this song (or, if I had it my way, FFH/BAI/BTS, in that sequence, as the encore).
-Marc.