Spencer then has no answer to the question why it is better to be more organized. So we turn at last to Aristotle. He has an answer. He sees that it is meaningless to talk of development, advance, higher and lower, except in relation to an end. There is no such thing as advance unless it is an advance towards something. A body moving purposelessly in a straight line through infinite space does not advance. It might as well be here as a mile hence. In either case it is no nearer to anything. But if it is moving towards a definite point, we can call this advance. Every mile it moves it gets nearer to its end. So, if we are to have a philosophy of evolution, it must be teleological. If nature is not advancing towards an end, there is no nearer and further, no higher and lower, no development. What then is the end? It is the actualization of reason, says Aristotle. The primal being is eternal reason, but this is not existent. It must come to exist. It first enunciates itself vaguely as gravitation. But this is far off from its end, which is the existence of reason, as such, in the world. It comes nearer in plants and animals. It is proximately reached in man, for man is the existent reason. But there is no question of the universe coming to a stop, when it reaches its end--(the usual objection to teleology). For the absolute end, absolute form, can never be reached. The higher is thus the more rational, the lower the less rational. Now if we try to go on asking, "why is it better to be more rational?" we find we cannot ask such a question. The word "why" means that we want a reason. And our question is absurd because we are asking a reason for reason. Why is it better to be rational means simply, "how is reason rational." To {312} doubt it is a self-contradiction. Or, to put the same thing in another way, reason is the Absolute. And to ask why it is better to be rational is to demand that the ultimate should be expressed in terms of something beyond it. Hence modern science has no philosophy of evolution, whereas Aristotle has. [Footnote 16] [Footnote 16: See H. S. Macran's _Hegel's Doctrine of Formal Logic_ (Clarendon Press), Introduction, section on the Conception of Evolution, to which I am much indebted in the above paragraphs.]