When they get there, they first inhabit those places of this world-body which are the deepest and at the same time the darkest for your eyes. When they improve, their coarse air-body is always transformed into a finer one, by means of which they then also come into a higher cauldron, and come into the small ones only as individuals, and into the larger ones as societies of like-minded people. – The Moon, Chapter 4, Paragraph 10