The first time I heard this on the car radio, it really put a hook in me. I did some reading and found that when Johnny Cash was near the end of his life, producer Rick Ruben set him up with a microphone in a living room sort of setting and recorded Cash, later adding minimal accompaniment. This traditional song from the Southern United States is a reflection on Judgement Day as described in the biblical Apocalypse of John, where the righteous, or saved, physically rise up from their graves in response to the angel Gabriel blowing his trumpet.
A close listen will reveal that Led Zeppelin, as they were wont to do, used the idea and some of the lyric as the basis for their anthem “In My Time of Dying”–which also put a hook in me the first time I heard Zeppelin play it at the Met Center in 1975.
I think one of Cash’s strengths as a singer was an honesty in his delivery, and that honesty powers this performance.