"The natural, as distinguished from the nurtural, distinctions at this period are probably much fewer than is supposed."
"The sharp allotment of this or that feature to nature or to nurture alone is therefore always wholly wrong: and the nice estimation of the relative importance of the natural as compared with the nurtural factors must necessarily be difficult, especially for the case of mankind, where critical observation, on a large scale, and with due control, of the effects of environment upon natural potentialities is still lacking."
"By this we mean, of course, the natural as distinguished from the nurtural differences -- to use the antithetic terms so usefully adapted by Sir"