To a slave his master may be better or worse. But there cannot be a good master. A good man cannot be a master and a master cannot be a good man. The same applies to the relationship between high caste and low caste. To a low caste man a high caste man can be better or worse as compared to other high caste men. A high caste man cannot be a good man in so far as he must have a low caste man to distinguish him as high caste man.
