4 THE CAUSATION OF DISEASE. 



(= resistance) apart from matter ; and, being thus unable to 

 mentally separate the two, we are justified in including, under 

 kind of matter and quantity of matter (= mass), both the 

 matter and the force which is inseparable from it. As regards 

 the different " kinds " of matter, this force is peculiar for each 

 kind, since each separate kind has specific powers of attraction 

 and repulsion. 



It follows that there is no need to make specific allusion 

 to " Force " among the material conditions above defined. It 

 will further be observed that no mention is made of " Space," 

 but this idea is embodied under "Disposition of Matter," 

 which signifies the relative positions which the particles of 

 matter occupy in space. 



Out of the material conditions above enumerated all the 

 effects within our experience can be obtained, be they physical 

 or mental. I mean by this, that all phenomena (the word is 

 convenient) could be referred to these material conditions, did 

 we possess the power of analysing the conditions out of which 

 they arise ; that, in investigating the origin of any phenomenon, 

 our search should be directed towards this end ; and that, 

 when we have discovered the material conditions out of which 

 that phenomenon has arisen, we possess the most perfect 

 knowledge of its causation which it is possible for us to obtain. 



I say the causation of mental phenomena, alike with that 

 of physical phenomena, can be expressed in terms of " material 

 conditions." Whatever psychological incongruity there may 

 appear in this, we shall find nevertheless — once more to 

 appeal to utilitarianism — that the conclusions obtainable from 

 this assumption are such as help us practically. What is 

 the connection between mind and matter matters little to us, 

 for it is now generally recognized that in every mental 

 sequence there is a corresponding physical sequence, and that 

 there is a close correlation between mental capacities and 

 tendencies on the one hand, and cerebral structure on the 

 other ; so that, in dealing with causes of mental phenomena 

 we shall still have to do with material conditions. 



According to the Law of Causation the same conditions 

 are always followed by the same result, and, while speaking 

 of the causation of mental phenomena, it is well to remark 



