By one tacit mental image, it was possible to present to spirits what an idea of lower spirits was like, what that of angelic spirits, and what that of angels, just by seeing it pictured that the inward parts of the mental image pertain to angelic spirits and the inward parts of those to angels. At the same time it was said that this which was done and seen in an instant, could not be presented to a person on earth by many pages, and [if it were] it would still not be understood. The reason for this of course is that they have no perception of what an idea is, still less of what is within, or inside of ideas, imagining everything to be on the surface, for this is how corporeal people arrive at their ideas. 1748, 24 Oct.