3288. HOW THE SPIRITS OF MERCURY ACQUIRE TO THEMSELVES THE KNOWLEDGE OF THINGS. (I spoke with them, and it was perceived that whenever they come, they at once perceive from the societies of other spirits what [these] know concerning such things as are then objects: for the faculty of spirits is such, that they at once perceive what others know, and what they do not know, so that there is communication, like as when a spirit comes to man. Thus it was several times granted them to know whatever I knew concerning anything, merely by inhering in their ideas, and so by exciting in me things, forgotten, or not forgotten, which may fall into their sphere: as has been several times, previously made known to me from experience. Wherefore because they thus wander about, it is granted them to know innumerable things, which they also retain. But still they confess that although they know indefinites, nevertheless there are indefinites still which they do not know; for never to eternity can it be given them to be able to know anything, not even the least, although there are indefinites, because from that [one] alone spring indefinities of indefinities, which they do not know. - 1748, September 23.)