This is one of my all time favorite Black Sabbath songs. This one is credited to the whole band, but it was actually written entirely by Guitarist Tony Iommi — the godfather of heavy metal guitar.
This song was off Master of Reality, Black Sabbath’s third album and best selling album in the United States. Because of the imagery in their stage sets and the fact that some of their songs were written with themes of the occult in mind, many people wrongly accused Sabbath of being a satanic band.
This song could probably be considered the first “Christian” heavy metal song, with its decidedly pro-Christianity lyrics.