IV 



SEX BIOLOGY AND SEX 



PSYCHOLOGY 



* And now I see with eye serene 

 The very pulse of the machine.' 



— Wordsworth. 



* There is reason to believe that the processes which underlie 

 all great work in art, literature, or science take place uncon- 

 sciously, or at least unwittingly. It is an interesting question to 

 ask whence comes the energy of which this work is the expression. 

 There are two chief possibilities : one, that it is derived from the 

 instinctive tendencies which, through the action of controlling 

 forces, fail to find their natural outlet 5 the other, that the energy 

 so arising is increased in amount through the conflict between 

 controlled and controlling forces.' — W. H. Rivirs, Imtinct and 

 the Unconxcioui. 



