...if one civilized man were doomed to pass a dozen years amid a race of intractable savages, unless he had power to improve them, I greatly question whether, at close of that period, he would not have become, at least, a barbarian himself. And I, as I could not make my young companions better, feared exceedingly that they would make me worse- would gradually bring my feelings, habits, capacities, to the level of their own; without, however, imparting to me their light-heartedness and cheerful vivacity. Already, I seemed to feel my intellect deteriorating, my heart petrifying, my soul contracting; and I trembled lest my very moral perceptions should be come deadened, my distinctions of right and wrong confounded, and all my better faculties be sunk at last, beneath the baneful influence of such a mode of life.