So hopelessly incapable was I of understanding better folk that I did not even know how to keep a servile tongue in my head. In a flash there appeared before my mind the difference between the two worlds in which we lived, this woman and I; although I was staying under her roof we were such poles apart from one another that it was only with half justification possible to classify us together as human beings; we were both vertebrates, certainly, even mammals, but there all resemblance ended; any human society of which both of us were members was merely an empty phrase.