Hurt by Johhny is very powerful. Trent Reznor even said, "He took my baby from me", saying Johnny Cash made the song his. He did it in a loving way, though. Johnny Cash is basically, "facing death" and his mortality. It brought teers to my eyes. I loved it so much. How Trent loving let the song be taken from him. Through his Charity, Johnny Cash's facing of death can be experienced.
Also, St. Elmos Fire (the song) inspered me to post this, by breaking free of the chains. Even I don't truly know all.
Edit: Patience