The Inner Organs of Expression 143 



sion except through the motor organs of use 

 in our present environment? There is; but 

 in order to observe it, a distinction must be 

 drawn between the inner and the outer or- 

 gans of expression. The action of the outer 

 organs of expression may be readily observed, 

 for every movement visible to the eye is a 

 result of their activity. We may likewise 

 observe the effects of the inner organs of 

 expression by examining the contents of con- 

 sciousness. Associations of ideas are not mere 

 passive relations, but are the results of the 

 motor mechanism of the mind. Exactly as 

 groups of motor centres act together when 

 you instinctively grasp an object, so do cer- 

 tain inner motor centres work together when 

 you construct a thought from which other 

 thoughts develop either as component parts 

 of the primary concept or as its successors. 

 The field of association, then, is the field of 

 inner activity, and it enables us to measure 

 the extent and the complexity of the motor 

 mechanisms which are active in the mind. 



By comparing the field of associations with 

 the field of external activity it can readily 



