These are not the only results which follow from the exercise of this faculty. By the spontaneous classifying action of our intelligence we rise from the perception of special and individual objects and phenomena to their various types, and hence to an inward and ideal world of specific representations, as if these were causative powers, informing the multitude of analogous and similar phenomena in which they are manifested. These specific types, which are more strongly present to the fancy in the primitive exercise of the intelligence, also become personified, and they generate what is called polytheism in all its forms, varying according to the races, times, places, and respective conditions of morality and civilization in which they are found.
The same psychical faculty and the same elements are necessary for the personification of such types or idols. The three elements appear in their proper sequence even in the amorphous phantasms which these types first shadow forth, and which are subsequently perfected and embodied in human form. For the consciousness of the external form always exists in the first vague and nebulous conception of the phantasm which gradually appears and formulates itself in the vivid imagination; and hence follows the phenomenal vest, which, as usual, generates the corresponding subject, informed with a causative power. This process clearly shows, and in fact constitutes, the essence of myth.
Since the types vary very much, and are indeed unstable from their very nature, constantly becoming formed and again decomposed, the primitive mythologies of all people are in like manner very various, indefinite, and subject to constant change.
It appears in the Vedic mythology, and also in that of the ancient Greeks and Latins, how often the typical myths of Agni, Varuna, Indra, Asvini, and Maruti; and again, of Zeus, Here, Athene, and the rest, are changed and reconstituted. This shows how the same human faculty, the same elements which constitute the perception and primitive personification of external phenomena, are those also of the specific and intrinsic phenomena. Just as man, in the primitive conditions of his existence, by the psychical and physiological law of his perception, which he has in common with animals, transformed the world and its phenomena into subjects endowed with conscious life; so by his psychical faculty of reduplication he personified the mental images of these same subjects as fetishes and myths; and subsequently invested them with more distinctly human forms, and also with specific types of humanity. The same faculty and conditions of animal perception afterwards become the true and only causes of the superstitions, mythologies, and religions of mankind. The law of continuity is unbroken, and this is a certain confirmation of the truth.
This faculty, inward function, and process of mythical and symbolic facts led in course of time to the evolution and beginning of knowledge, which is first empirical and then rational. Therefore, we must repeat, the extrinsic and intrinsic perception, the specification of types, and their modification into a unity which was always becoming more comprehensive, are the conditions and method of science itself, which is only developed by means of this faculty. Hence the elements and intrinsic logical form of science are identical with those through which mythical representations and the inward life of the human intelligence are developed.[25]
Besides, as we have before remarked, the empirical knowledge of things begins and is perfected in the superstitions of fetishes and myths. Ideas are modified and become purer as they converge into types, and the principle and method at once become more rational. Either in the faculty of perception and in its elements, or in the inward classification of specific forms, or again in the more perfect empirical knowledge of phenomena, the progress of myth and science go on together, and they are not only developed in a parallel direction, but the form becomes the covering, involucre, matrix, or, as I might say, the cotyledons, by means of which the latter is developed and nourished. Even in more rational science this faculty, and these elements, necessarily recur, since in every human conception we find the material aspect, or its mental image, the thing and its cause, and, as we shall see, some mythical personality is insensibly identified with it.
The act which produces myth is therefore the same from which science proceeds, so that their original source is identical. The same process which constitutes the fetish and myth also constitutes science in its conditions and form, and here we find the unique fact which generates them both; science, like myth, would be impossible without apprehension, without the individuation of ideas, and the classification and specification of types.
Before going further I must briefly recapitulate the order of ideas and facts which we have observed, so that the process may be as strictly logical as it is practical. Since, in the elements of apprehension, perception is absolutely identical in man and animals, its primitive effects in animating natural phenomena are the same. But man, by means of his reduplicative faculty, retains a mental image of the personified subject which is only transitory in the case of animals, and it thus becomes an inward fetish, by the same law, and consisting of the same elements as that which is only extrinsic. These phantasms are, moreover, personified by the classifying process of types, they are transformed into human images, and arranged in a hierarchy, and to this the various religions and mythologies of the world owe their origin. Since such a process is also the condition and form of knowledge, the source of myth and science is fundamentally the same, for they are generated by the same psychical fact. It is in this way that the progress of human intelligence was developed in the course of ages; its attitude varies in various races, but the impulses, the faculty, and its elements are identical. I do not think that this unique fact in which myth and science have their source has been observed before; still less has any one defined the limits of human intelligence, and recognized in the simple acts of animals the formal and absolute conditions of human science, and the origin of myth.
If I am not deluded by a prejudice in favour of my own researches, this theory is a contribution to truth. It is confirmed by the solidarity which it establishes between the acts and laws of the psychical human faculty, and that of animals which necessarily preceded it. No science can be constituted without such solidarity; this great truth was felt and, after their manner, demonstrated by scholastic philosophers, or, as it was afterwards scientifically expressed by the genius of Leibnitz: Natura non facit saltum!