See, everything in itself as a whole, from the biggest to the smallest, has as a cover and as protection of its most artful inner, an outer skin! This outer skin has also the very important purpose, that it adsorbs the impure from the inner mechanism of an enlivened body and as unsuitable for the organic life, conducts it to the outside, but then soaks up purified life nourishment from the outside and conducts it as life strengthening to the inner organic body life mechanism. From this you can at least form a clear idea, why I call the whole sun- and world- super universe compendium a shell-globe. – The Great Gospel of John, Book 6, Chapter 245, Paragraph 12