But the truth is, of course, that it is not universal at all, and that nothing in the so-called soul of man prompts him to subscribe to it. We cling to it today, not because it is inherent in us, but simply because it is the moral fashion of our age. When the disciples first heard it put into terms, it probably struck them as a revolutionary novelty, and on some dim tomorrow our descendants may regard it as an archaic absurdity. In brief, rules of morality are wholly temporal and temporary, for the good and sufficient reason that there is no "natural morality" in man--and the sentimental rule that the strong shall give of their strength to the weak is no exception. There have been times in the history of the race when few, if any intelligent men subscribed to it, and there are thousands of intelligent men who refuse to subscribe to it today, and no doubt there will come a time when those who are against it will once more greatly outnumber those who are in favor of it. So with all other "eternal laws." Their eternality exists only in the imagination of those who seek to glorify them. Nietzsche himself spent his best years demonstrating this, and we have seen how he set about the task--how he showed that the "good" of one race and age was the "bad" of some other race and age--how the "natural morality" of the Periclean Greeks, for example, differed diametrically from the "natural morality" of the captive Jews. All history bears him out. Mankind is ever revising and abandoning its "inherent" ideas. We say today that the human mind instinctively revolts against cruel punishments, and yet a moment's reflection recalls the fact that the world is, and always has been peopled by millions to whom cruelty, not only to enemies but to the weak in general, seems and has seemed wholly natural and agreeable. We say that man has an "innate" impulse to be fair and just, and yet it is a commonplace observation that multitudes of men, in the midst of our most civilized societies, have little more sense of justice than so many jackals. Therefore, we may safely set aside the argument that a "natural" instinct for sentimental self-sacrifice stands as an impassable barrier to Nietzsche's dionysian philosophy. There is no such barrier. There is no such instinct. It is an idea merely--an idea powerful and persistent, but still mutable and mortal. Certainly, it is absurd to plead it in proof against the one man who did most to establish its mutability.