This beautiful quote from The Magician's Doubts: Nabokov and the Risks of Fiction uncovers a powerful observation on the function of style for an artist. What is in question is the way in which Nabokov comes to what really are aporias - difficult crossings - in his writing, discussions of the roots of knowledge or of ethics. It is the particular way in which Nabokov can dive down into some of the most beautiful writing in the English language, only to then surface into parodies of literary style