Even in animals there is a primitive thinking, rising above the level of blind instinct. But it can neither be schooled, nor is it capable of developing even the crudest beginnings of science. Even the animal has a sensory satisfaction in colour, form and tone (not nearly so much, however, as the theory of sexual selection requires us to suppose). But art, even the most rudimentary self-expression of the spirit upon this basis, is wholly sealed to it. Even the animal possesses strong altruistic instincts, impulses towards companionship, pairing, and caring for its young, and some have seen in this the beginnings of morality. But morality is a matter of the spirit, which begins with the idea of duty and rises to the recognition of an ideal of life. Nowhere else do we see so directly and emphatically the incomparability of the natural-psychical and the spiritual as in the idea of duty and an ideal of life, although the contrast is equally great at all points of the spiritual life.
Finally and highest of all, we have the capacity of the human spirit to rise to religion and the greatest heights of feeling. In science and art, in morality and religion, the spirit possesses itself. And as such it is a unique and strange guest in this world, absolutely incomparable with anything beneath or around it. It may, perhaps, be true that the psychical difference between the ape and man is smaller than that between the ape and unicellular organisms (though we really can know nothing about that). But nowhere in the animal world does the psychical overstep the limits of purely natural existence, of striving after and being prompted by the directly and purely natural ends of a vegetative and animal instinctive life, physical pleasure, self-preservation, and the maintenance of the species.
And there is more than this. However different the psychical equipment may be at different animal stages, it has one thing in common in them all, it is absolutely limited to what is given it by nature. An animal species may last for a million years. But it has no history. It is and remains the same history-less natural product. In this respect the animal is not a step in advance of the stone or the crystal. The only thing it can achieve is to express more or less perfectly the character of the species. This is the utmost height of its capacity. But for man this is only the starting-point, and the really human begins just there. What is implicit in him as _homo sapiens_, a member of a zoological order, is nothing more than the natural basis upon which, in human and individual history, he may build up an entirely unique and new creation, an upper story: the world and life of the spirit.