The Sayyids in particular, among the sources of music from esoteric schools, are remarkable for their alternation, back and forth, between a vocal or instrumental invocation of higher forces and a rhythmic dance movement to express those forces here below. Gurdjieff’s balance between inner and outer work, though different and quite original also, throws light on such cross-currents of the Truth everywhere. De Hartmann seems to have been touched by a very special presence while playing this one.