Lyle Lovett inducts Johnny Cash into the Rock and Roll Hall of Fame during the 1992 Hall of Fame Induction Ceremony, and Johnny Cash gives his acceptance speech. http://rockhall.com/inductees/johnny-cash/
I found part of this clip elsewhere, but missing Cash's extended spoken introduction. I hate to sound like a college nerd (because I'm not, I just married one), but the additional context his remarks add make the song even more impressive to me. This was from the February 17, 1971 episode of his show, by which time the Suits had forced him to start doing "theme" shows. This is from the best of the bunch, "Johnny Cash On Campus," which also featured Neil Young and James Taylor. It's super cool to hear Cash introduce what would go on to become his signature song to zero crowd applause. It's like hearing a recording of Zepplin play "Stairway..." to audience indifference before the album was released. Shiver me timbers!
Kristofferson originally wrote this song about Johnny Cash's struggles with addiction for a sobriety party in the 1970s. He explained to Billboard magazine: "Everyone was supposed to say something inspirational, so I wrote a song. I tried to record this once before with Willie Nelson and my band. When I sang the chorus, they echoed me when I would sing 'Good morning John.' When I got to the line that said 'I love you John,' Willie said 'He loves you John' and we all cracked up laughing. We never finished it, so I finished it myself."