"Yet there should be a Caution given in some Cases: the Memory of a Child or any infirm person should not be over-burdened; for a Limb or a Joint may be overstrained by being too much loaded, and its natural Power never be recovered."
— 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>