132 Mind and Body 



as we are talking of events of the external kind, i.e., of 

 brain processes, we cannot deny what we know of these 

 events as such. 



The general state of the problem may be shown by 

 the accompanying diagram, which will at any rate serve 

 the modest purpose of indicating the alternatives. The 

 upper line (M) of the two parallels may represent the 

 statements on the psychological side which, on the theory 

 of parallelism, mental science has a right to make ; the 

 lower of the parallels (B) then represents the correspond- 

 ing series of statements made by physics and natural sci- 

 ence, including the chemistry and physiology of the brain. 

 Where these lines stop an upright line may be drawn 



M 



L _ *^ 



W 



B 



to indicate the setting of the problem of interpretation 

 in which both the other series of statements claim to 

 be true, and the further line to the right ( W) then gives 

 the phenomena and statements of them which we have to 

 deal with when we come to consider man as a whole. 



Now my point is that we can neither deny either of 

 the parallel lines in dealing with the phenomena of the 

 single line to the right, nor can we take either of them 

 as a sufficient statement of the further problem which 

 the line to the right proposes. To take the line repre- 

 senting the mechanical principles of nature and extend 

 it alone beyond the upright is to throw out of nature 

 the whole series of phenomena which belong in the 



