" This choice of symbol, too, is not arbitrary, but is documented by alchemical literature from the first to the eighteenth century. The lapis is produced, as we have already seen, from the splitting and putting together of the four elements, from the rotundum. The rotundum is a highly abstract, transcendent idea, which by reason of its roundness76 and wholeness refers to the Original Man, the Anthropos. "

― C.G. Jung , Aion (Collected Works 9ii)