LIFE; BODY AND MIND 219 



determinism; the science of biology, unless it is 

 to ignore deliberately the phenomenon of be- 

 havior, must abandon this postulate and substi- 

 tute therefor a postulate of choice or freedom. 

 We are justly proud of the likeness that we 

 have achieved in this portrait of nature that we 

 call science ; but there is far more to be seen than 

 we have yet seen, and nature itself is changing 

 and growing. As in the laboratory, so probably 

 also in nature, chemical molecules are daily 

 manufactured that were never made before. As 

 we continue the great adventure of scientific ex- 

 ploration our models must often be recast. New 

 laws and postulates will be required, while those 

 that we already have must be broadened, ex- 

 tended and generalized in ways that we are now 

 hardly able to surmise. 



'cV 



^GIC^/ 



juj 



