Jean Piaget, «Autobiography», in A History of Psychology in Autobiography (Vol. 4), eds. Herbert S. Langfeld, Edwin G. Boring, Heinz Werner, and Robert M. Yerkes (Oxford, UK: Clark University Press), 237. Also quoted in Elwyn James Anthony, «Children at High Risk of Psychosis Growing Up Successfully», in The Invulnerable Child, eds. Elwyn James Anthony and Bertram J. Cohler (New York: Guilford Press, 1987), 161.
