But no kind of factual observation and no appeal to instinct will give him a ground for this option. Once more, he is in fact deriving it from the Tao: a duty to our own kin, because they are our own kin, is a part of traditional morality. But side by side with it in the Tao, and limiting it, lie the inflexible demands of justice, and the rule that, in the long run, all men are our brothers.
