"Substance for a writer consists not merely of those realities he 
thinks he discovers; it consists even more of those realities which have 
been made available to him by the literature and idioms of his own day 
and by the images that still have vital£ty in the literature of the past. 
Stylistically, a writer can express his feeling about this substance either 
by imitation, if it sits well with him, or by parody, if it doesn't. " 1