John Prine, on CBS's "Late Show"

There was a wonderful segment, recently--April 12th, to be precise--on Stephen Colbert's CBS program.  

The segment featured singer/musician/songwriter John Prine.  He performed "Summer's End," a song from his new album, The Tree of Forgiveness. The performers Sturgill Simpson and Brandi Carlile joined him, on the program.

I have watched the video of the appearance many times, since then. 

https://www.youtube.com/watch?v=EAmrYOnsnNE

The song; Prine's quiet, unadorned, lovely vocal performance of it, on CBS; and the performances of the accompanying singers and musicians:  they were/are deeply moving, and very beautiful.