This is definitely a piece to be happy about...It is seriously awesome, and I congratulate you, the harmonys for the most part work very well, And the piano parts (from what I could "hear", being not a Sibelius user) sounded good too...The cello also worked quite well...Some of the short moments without choir were pretty cool, like around 30 seconds in were it appeared to take off at a quicker speed it kept till near the end...I wasn't so sure about what kind of effect you were going for with the ending...didn't totally feel right with the rest of the piece...But that's just my opinion, and of course with the midi sounds I get for choir...It's harder to like things as much...This would definitely sound good with a real choir...And I look forward to hearing it again
Lyrics were good too by the way, but I think I will like them better when I can to which notes their on...