"THEN as to Correction, the Heart being hardned, as before, by Opinion and Practice, and especially in a Belief that he ought not to be corrected, the Rod of Correction has a different Effect; for as the Blow of a Stripe makes an Impression on the Heart of a Child, as stamping a Seal does upon the soft Wax, the Reproof even of Words on the same Heart when grown up, and made hard, is like striking upon Steel, which instead of making an Impression on the Metal, darts back sparks of Fire in your Face."
— Defoe, Daniel (1660?-1731)
Text from The Family Instructor: In Three Parts; I. Relating to Fathers and Children. II. To Masters and Servants. III. To Husbands and Wives. (London: Printed for Eman. Matthews, 1715). <Link to Vol. I in ECCO-TCP>