"Such practices may happen to discourage and jade the Mind by an Attempt above its Power, it may balk the Understanding, and create an Aversion to future Diligence, and perhaps by Despair may forbid the Pursuit of that subject for ever afterwards; as a Limb over-strained by lifting a Weight above its Power, may never recover its former Agility and Vigour; or if it does, the Man may be frighted from ever exerting his Strength again."
— 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>