This is the song "Vocari Dei" by Swedish Progressive band Pain of Salvation. I mainly uploading it for the readers of my blog, but if you found it by searching, then enjoy!
Before the release of "BE", Pain of Salvation had "God's Answering Machine" on their website. You could call in and leave a message to "God", whatever that word meant for you. This song is a collection of 20-30 of the most emotional and deep messages left on that machine.