98 SECTIONAL ADDRESSES 
We must adopt a more concrete and more adequate concept of the 
living organism, one that will take account of its essential characteristics. 
We must think of the organism as a four-dimensional whole, or directive 
cyclical process, and no longer attempt to contain it within the static 
scheme of the classical materialism. This does not lead to any form of 
dualistic vitalism. ‘The relation of behavioural or ‘ psychological ’ 
activities to physiological is not the relation of mental to physical activities, 
but is, quite simply, the relation of a whole spatio-temporal directive 
process to its parts. 
