Doris Lessing said this quote
“ What had happened was that the formal pattern of black-and-white, mistress-and-servant, had been broken by the personal relation; and when a white man in Africa by accident looks into the eyes of a native and sees the human being (which it is his chief preoccupation to avoid), his sense of guilt, which he denies, fumes up in resentment and he brings down the whip. ”