This is a cover of a song by Sting. I haven't heard Sting's version but I am not a fan of what I have heard. Anyway, Cash's version is stripped down to the bare essentials, acoustic guitar and piano with a little bit of keyboard in the background to add some depth, but the music is secondary to the great mans voice. He's in his seventies, and all the age an experience in his voice just makes the youth and experience of the lyrics all the more poignant. His voice reminds me of my grandfather (May he rest in peace). The whole Album (American Recordings IV - The Man Comes Around) is incredible and this song is a stand out track among many, both original and covered.
from American Recordings IV The Man Comes Around (American 063 339-2), available on CD