Epicurus "fancied, that an infinite multitude of subtle images; some flowing from bodies, some formed in the air of their own accord, and others made up of different things variously combined, are always moving up and down around us: and that these images, being of extreme fineness, penetrate our bodies, and, striking upon the mind, give rise to that mode of perception which we call Imagination."
Of Dreaming [from Dissertations Moral and Critical]
Beattie, James. <u>Dissertations Moral and Critical</u>. Printed for Strahan, Cadell, and Creech: London, 1783. Facsimile-Reprint: Friedrich Frommann Verlag, Stuttgart-Bad Cannstatt, 1970.