Greatest Thanks Giving Music?

When Beethoven, late in his life, and fully deaf, survived a serious illness, he wrote a slow movement for one of his fabled final string quartets, calling it a  "convalescent's holy song of Thanksgiving,"  now known as the Heiliger Dankgesang.  I am not alone in considering it perhaps the greatest and most profound single piece of music ever written.  Below this recording, if you are so inclined, a one-hour lecture about it from Rob Kapilow.