To quote R&R: "not exactly progessive" (but maybe it was?).
Despite growing up with a classical background, I'd heard snippets of a passionate & powerful piece of choral work, in commercials, movies, etc. It took a while to peg it, but I found it was the first/last movement of Carmina Burana by Carl Orff, entitled "O Fortuna". It still is a masterpiece in my book.
http://www.youtube.com/watch?v=EEHO1iSjnSc (old & grainy but moving classical version)
TSO also does a fantastic version (excuse the phone video):
http://www.youtube.com/watch?v=2hX1m39N2yM
Lyrics:
http://www-astro.physics.ox.ac.uk/~r...yr.html#track1