"But Words and Things which he lately spoke or did, they are immediately forgot, because the Brain is now grown more dry and solid in its Consistence, and receives not much more impression than if you wrote with your Finger on a Floor of Clay, or a plaister'd Wall."
— Watts, Isaac (1674-1748)
Most text drawn from Google Books. See The Improvement of the Mind: or, a Supplement to the Art of Logick: Containing a Variety of Remarks and Rules for the Attainment and Communication of Useful Knowledge, in Religion, in the Sciences, and in Common Life. By I. Watts, D.D. (London: Printed for James Brackstone, at the Globe in Cornhill, 1741). <Link to ESTC><Link to 2nd edition in Google Books>