Even as heavy metal flirted with Satan in the 1970s, pop music was being touched by God. George Harrison was the first to knock on heaven's door when he released "My Sweet Lord" in 1970. The following year, the Canadian group Ocean ascended the charts with "Put Your Hand in the Hand (of the Man from Galilee):" Two 1971 Broadway musicals were based on Jesus parables — Godspell and Jesus Christ Superstar — and each produced a hit. "Day by Day" arose from Godspell, while Yvonne Elliman and Helen Reddy both confessed, "I Don't Know How to Love Him." Other holy hits during the early 1970s included the movie theme "One Tin Soldier" (from Billy Jack) and the Doobie Brothers' eulogy "Jesus Is Just Alright." Apollo 100 turned a traditional hymn into a pop instrumental with "Joy," and Sister Janet Mead made a hit out...