483. By the names which follow: "Seth" "Enosh" "Kenan" "Mahalalel" "Jared" "Enoch" "Methuselah" "Lamech" "Noah" are signified so many churches, of which the first and principal was called "Man." The chief characteristic of these churches was perception, wherefore the differences of the churches of that time were chiefly differences of perception. I may here mention concerning perception, that in the universal heaven there reigns nothing but a perception of good and truth, which is such as cannot be described, with innumerable differences, so that no two societies enjoy similar perception; the perceptions there existing are distinguished into genera and species, and the genera are innumerable, and the species of each genus are likewise innumerable; but concerning these, of the Lord's Divine mercy hereafter. Since then there are innumerable genera, and innumerable species in each genus, and still more innumerable varieties in the species, it is evident how little-so little that it is almost nothing the world at this day knows concerning things celestial and spiritual, since they do not know even what perception is, and if they are told, they do not believe that any such thing exists; and so with other things also. The Most Ancient Church represented the celestial kingdom of the Lord, even as to the generic and specific differences of perception; but whereas the nature of perception, even in its most general aspect, is at this day utterly unknown, any account of the genera and species of the perceptions of these churches would necessarily appear dark and strange. They were at that time distinguished into houses, families, and nations, and contracted marriage within their houses and families, in order that genera and species of perceptions might exist, and be derived from the parents precisely as are the propagations of native character; wherefore those who were of the Most Ancient Church dwell together in heaven.