Date: 1592

"Thine eye the glasse where I behold my hart, / mine eye the window, through the which thine eye / may see my hart, and there thy selfe espye / in bloudie colours how thou painted art."

— Constable, Henry (1562-1613)

Date: 1690, 1694, 1695, 1700, 1706

"Would the pictures coming into such a dark room but stay there, and lie so orderly as to be found upon occasion, it would very much resemble the understanding of a man, in reference to all objects of sight, and the ideas of them"

— Locke, John (1632-1704)