Wow.
This is an incredibly subtle and moving piece. Your use of dynamics in the orchestration is quite effectively done, and the progression throughout the song is as I said, moving. Your mission to write something meaningful is most definitely achieved; I'll be honest, I got goosebumps.
The lyrics are very relevant and moving as well, though I couldn't really imagine what type of vocals would fit into the song, so I'm kind of glad you simply left them in written form.
This is some seriously good cinematic music right here. I could easily imagine it in a dramatic movie; suddenly it reminds me of 2001: A Space Odyssey and Book of Eli, which both have excellent musical scores. This is a beautiful song that not only showcases your talent, but also moves the listener's emotions. Awesome.