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logic of induction in all others, according to their 

 sensations and modes of perception. In the vast 

 historic drama of opinions, beliefs, religions, mythical 

 and mytho-scientific theories which are developed in 

 all peoples; and again, in the infinite variety of 

 dreams, illusions, mystic and nervous hallucinations, 

 all depend on the primitive and unique fact which is 

 also common to the animal kingdom, and identical 

 with it ; in man this is also the condition of science 

 and knowledge. I think that this conclusion is not 

 unworthy of the consideration of wise men and honest 

 critics, and that it will contribute to establish the 

 definitive unity of the general science of psychology, 

 considered in the vast animal kingdom as a whole, 

 and in connection with the great theory of evolution. 

 This primitive act of perception, the radical cause 

 and genesis of all mythical representations, and the 

 physical and intellectual condition of science itself, is 

 also one of the factors and the aesthetic germ of all 

 the arts. The constraining power which generates 

 the intentional subjectivity of the phenomenon, and 

 the entification of images, ideas, and numerous 

 normal and abnormal appearances, also unconsciously 

 impels man to project the image into a design, a sculp- 

 ture, or a monument. Since an idea or emotion 

 naturally tends, as we have seen, to take an external 

 form in speech, gesture, or some other outward fact ; 

 so also it tends to manifest itself materially and by 

 means of various arts, and to take the permanent 



