I have often heard

I have often heard persons of good judgment say that all the stir that people make in the world about ghosts and apparitions is owing to the strength of imagination, and the powerful operation of fancy in their minds; that there is no such thing as a spirit appearing, or a ghost walking; that people's poring affectionately upon the past conversation of their deceased friends so realises it to them that they are capable of fancying, upon some extraordinary circumstances, that they see them, talk to them, and are answered by them, when, in truth, there is nothing but shadow and vapour in the thing, and they really know nothing of the matter.