"So varied are the activities of the Fourth Heaven, the highest of the nipa levels, that it is difficult to group them under a single characteristic. Perhaps they might best be arranged into four main divisions: unselfish pursuit of spiritual knowledge, high philosophic or scientific thought, literary or artistic ability exercised for unselfish purposes, and service for the sake of service. Here we find all our greatest musicians; on this sub-plane Mozart, Beethoven, Bach, Wagner and others are still flooding the heaven world with harmony far more glorious even than the· grandest which they were able to produce when on earth. It seems as if a great stream of divine music poured into them from higher regions, and was, as it were, specialized by them and made their own, to be then sent forth through all the plane in a great tide of" melody which adds to the bliss of all around."