HUMAN SENSATION AND PERCEPTION. 81 



perceptions, ideas, sentiments, and all kinds of 

 emotions. We know that man has not only the 

 perception of external and internal things, but also 

 the perception of this perception. Hence the external 

 form, or the internal sentiment and emotion, may by 

 the dominion of his will over all the attributes of his 

 intelligence be once more subjected to his deliberate 

 observation and intuition; by this process the external 

 and internal world are doubled in their intrinsic ideal, 

 and give birth to analysis and abstraction, that is, to 

 the specification and generalization of the things 

 observed. 



When this spontaneous faculty of man has been 

 developed within him, his observation of the similari- 

 ties, analogies, differences, and identities which are to 

 be found in all things and phenomena, in sentiments 

 and emotions, necessarily induces him to collect and 

 simplify them in special forms, to combine these 

 various intuitions in a homologous type ; this type 

 corresponds with an external or internal congeries of 

 similar, identical, or analogous images or ideas, out of 

 which the species and genera of the intellect are 

 formed. In this way, for instance, arose the mental 

 classification of trees, plants, flowers, rivers, springs, 

 animals, and the like, as well as that of love, hatred, 

 sorrow, anger, birth, and death, strength, weakness, 

 rule, and obedience ; in short, the generic conceptions 

 of all natural phenomena, as well as of psychical 

 sentiments and emotions. 



