"But 'tis easily solv'd, by answering that it is but a seeming Contradiction, for both the Apparitions are visible, only not to the same Optick Powers; the Apparition in Dream is visible to the intellectual sight, to the Eye of the Soul; and the Day-light Apparition is visible to the common ordinary sight."
— 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>