“On this piano the vibrations of each ‘whole tone’ and of each ‘half tone’ of any octave pass from one to another strictly according to the law of the sacred Heptaparaparshinokh and thus their vibrations, as occurs always and everywhere in the Universe, mutually help one another to evolve or involve.”

“On this piano the vibrations of each ‘whole tone’ and of each ‘half tone’ of any octave pass from one to another strictly according to the law of the sacred Heptaparaparshinokh and thus their vibrations, as occurs always and everywhere in the Universe, mutually help one another to evolve or involve.”

— G.I. Gurdjieff