This is an amazing song, and part of that is where the song is based out of (read Romans 1: 18-32). Though it is based mostly on the first part of the passage, it talks about the degrading of man and the turning from God - one section (sentence) of this song is taken directly from the scripture found there ('Their foolish hearts were darkened' - Romans 1: 21c).
I applaud this band for their willingness to write songs with a strong Christian backbone and for shining the light of Christ.