202 THE XEKVOUS SYSTKM AND ITS CONSERVATION 



habitual petty cares and scope for the idealistic life. 

 A certain parallel may be suggested between tin- renewing 

 function <,f the Sabbath and the benefit to the eyes that 

 proceeds from relaxing the mu-cle of accommodation. 

 \\'c iiece-.-arily bestow much of our attention upon objects 

 clo<e at hand and rapidly chanji'hifi'- AYe rest our eyes by 

 looking away to the mountains with their unvarying out- 

 lines. So the nervous system, after making its swift 

 adaptive changes to meet the innumerable little exiucn- 

 cies of th(> six days, may well be permitted on the seventh 

 to find a profoundly restful relation to "the things which 

 are not seen." 



