"It is without Doubt, that Fancy and Imagination form a world of Apparitions in the Minds of Men and Women; (for we must not exclude the Ladies in this Part, whatever we do) and People go away as thoroughly possess'd with the Reality of having seen the Devil, as if they convers'd Face to Face with him; when in short the Matter is no more than a Vapour of the Brain, a sick delirious fume of Smoke in the Hypochondria; forming it self in such and such Figure to the Eye-sight of the Mind, as well as of the Head, which all look'd upon with a calm Revision, would appear, as it really is, nothing but a Nothing, a Skeleton of the Brain, a Whymsy, and no more."
— Defoe, Daniel (1660?-1731)
Text from An Essay on the History and Reality of Apparitions: Being an Account of What They are, and What They are Not; Whence They Come, and Whence They Come Not. (London: Printed: and sold by J. Roberts, 1727). <Link to ECCO-TCP>