From the recording John The Revelator

"John the Revelator" is a traditional gospel blues call and response song.[1] It has been called "one of the most powerful songs in all of pre-war acoustic music ... [which] has been hugely influential to blues performers".[2] American gospel-blues musician Blind Willie Johnson recorded "John the Revelator" in 1930 and subsequently a variety of artists have recorded their renditions of the song, often with variations in the verses and music. The song's title refers to the Apostle John, the author of the Book of Revelation, and quotes several passages from the Bible in the tradition of African-American spirituals.