When a child does lie, parents should take themselves to task rather than him ; they should deal with it by removing its causes, and by explaining gently and reasonably why it is better not to lie. They should not deal with it by punishment, which only increases fear and therefore the motive for lying.
出典： On Education, especially in early ｃhildhood, 1926, Pt. 2：Education of character, chap. 8: Truthfulness