For Tylor, this extension of animism was due to the particular mentality of the primitive who, like an infant, cannot distinguish the animate and the inanimate. Since the first beings of which the child commences to have an idea are men, that is, himself and those around him, it is upon this model of human nature that he tends to think of everything. The toys with which he plays, or the objects of every sort which affect his senses, he regards as living beings like himself. Now the primitive thinks like a child. Consequently, he also is inclined to endow all things, even inanimate ones, with a nature analogous to his own. Then if, for the reasons exposed above, he once arrives at the idea that man is a body animated by a spirit, he must necessarily attribute a duality of this sort and souls like his own even to inert bodies themselves. Yet the sphere of action of the two could not be the same. The souls of men have a direct influence only upon the world of men: they have a marked preference for the human organism, even when death has given them their liberty. On the other hand, the souls of things reside especially in these things, and are regarded as the productive causes of all that passes there. The first account for health and sickness, skilfulness or unskilfulness, etc.; by the second are explained especially the phenomena of the physical world, the movement of water-courses or the stars, the germination of plants, the reproduction of animals, etc. Thus the first philosophy of man, which is at the basis of the ancestor-cult, is completed by a philosophy of the world. In regard to these cosmic spirits, man finds himself in a state of dependence still more evident than that in regard to the wandering doubles of his ancestors. For he could have only ideal and imaginary relations with the latter, but he depends upon things in reality; to live, he has need of their concurrence; he then believes that he has an equal need of the spirits which appear to animate these things and to determine their diverse manifestations. He implores their assistance, he solicits them with offerings and prayers, and the religion of man is thus completed in a religion of nature.