He was so deep, so brilliant. Here is a link to his song “Jerusalem Tomorrow,” which he does better than the more famous recording by Emmylou Harris.
https://www.youtube.com/watch?v=8bMaaac032k
“Jerusalem Tomorrow” is an amazing song and I was only familiar with Emmylou Harris’ version, which is quite exceptional.
That said, David Olney’s cover of his own song is more haunting.