If you are not familiar with The Louvin Brothers, check their "Satan is real" album, listen to the lyrics, and when you are done with it, read about them. Preferably in that order. Just the album cover is worth the price of admission. Don’t get me wrong, it is some fine spiritual country music. It is quite brilliant.
This is from Wikipedia (quote from elsewhere, though)...
Mark Deming stated in his AllMusic review: "You don’t need to share the Louvin Brothers’ spiritual beliefs to be moved by the grace, beauty and lack of pretension of this music; Satan Is Real is music crafted by true believers sharing their faith, and its power goes beyond Christian doctrine into something at once deeply personal and truly universal, and the result is the Louvin Brothers’ masterpiece."
"There is a reason why songs from this album have been performed by the more commonly accepted genius of artists such as Gram Parsons, Johnny Cash, and Emmylou Harris."