Cash was talking about his recent remake of Trent Reznor's "Hurt". He said (best I can remember):

That's a great song. It sounds like something I could have written if I could write that good in the 60's.

This from a guy in the Country Music Hall of Fame, Rock and Roll Hall of Fame and Songwriters Hall of Fame. Huge compliment.

Asked how he was able to find songs from so many genres that fit his style, he said, "An open mind helps."

[Edit: typo in subject]