4 PREFACE 



suspect that Natural Science was preparing a 

 new revolution/' 



The only thing I have succeeded in doing 

 which is at all new, is presenting these so- 

 called heavy subjects in a way that attracts 

 and retains a large and enthusiastic audience 

 Sunday after Sunday eight months of the year. 



These lectures, nothwithstanding their 

 phenomenal success, have aroused some oppo- 

 sition, in certain quarters among Socialists. 

 This opposition arises almost wholly from the 

 fact that the Socialists in question have yet to 

 learn what their own standard literature con- 

 tains. When they make that discovery they 

 will be obliged to do one of two things, reject 

 the Socialist* philosophy or cease opposing its 

 public presentation. 



A second thought will show that they may 

 do neither. There is a type of brain the 

 specimens of which are very numerous, which 

 seems to possess the faculty of keeping differ- 

 ent kinds of knowledge and contradictory 

 ideas, in separate, water-tight compartments. 

 Thus, as these ideas never come together there 

 is no collision. 



The most conspicuous example of this is the 

 man who accepts and openly proclaims the 

 truth of the materialistic conception of history 

 — the theory that, among other things, explains 



