The most historically significant releases were The Music of Gurdjieff/de Hartmann in 1989, Harmonic Development (2004), a. G.I. Gurdjieff Sacred Hymns Keith Jarrett ECM Records (1980) Keith Jarrett is a renowned jazz pianist and composer who performs both jazz and classical music… Today I watched a very profound post by Bob Johnson, removed from the rec list at MyDD. I just read another diary there referring to people who called…