14. The spirits of Mercury, above all other spirits, possess the knowledges of things, as well respecting this solar system, as respecting the earths which are in the starry heavens; and what they have once acquired to themselves, that they retain, and also recollect as often as anything similar occurs. Hence also it may appear manifest, that spirits have memory, and that it is much more perfect than the memory of men; and further, that what they hear, see, and apperceive, they retain, and especially such things as delight them, as these spirits are delighted with the knowledges of things. For whatever things cause delight, and affect the love, these flow in as it were spontaneously, and remain; other things do not enter, but only touch the surface and pass by.