330 DEVELOPMENT AND PURPOSE CHAP, iv 



in teleological ways exclusively. To avoid misunderstanding it should be 

 added that there is no warrant in this statement for the inference that 

 in the living being either the mechanical or the teleological factor is the 

 ' substance ' of which the other is the ' quality/ Both factors qualify 

 the total Reality, which in addition may contain many unknown 

 elements. 



