Nabokov: good readers

"... So what is the authentic instrument to be used by the reader? It is impersonal imagination and artistic delight. What should be established, I think, is an artistic harmonious balance between the reader’s mind and the author’s mind. We ought to remain a little aloof and take pleasure in this aloofness while at the same time we keenly enjoy—passionately enjoy, enjoy with tears and shivers—the inner weave of a given masterpiece. To be quite objective in these matters is of course impossible. Everything that is worthwhile is to some extent subjective. For instance, you sitting there may be merely my dream, and I may be your nightmare. But what I mean is that the reader must know when and where to curb his imagination and this he does by trying to get clear the specific world the author places at his disposal. We must see things and hear things, we must visualize the rooms, the clothes, the manners of an author’s people. The color of Fanny Price’s eyes in Mansfield Park and the furnishing of her cold little room are important.  

We all have different temperaments, and I can tell you right now that the best temperament for a reader to have, or to develop, is a combination of the artistic and the scientific one. The enthusiastic artist alone is apt to be too subjective in his attitude towards a book, and so a scientific coolness of judgment will temper the intuitive heat. If, however, a would-be reader is utterly devoid of passion and patience—of an artist’s passion and a scientist’s patience—he will hardly enjoy great literature..." 

(Vladimir Nabokov, "Good Readers and Good Writers" http://www.en.utexas.edu/amlit/amlitprivate/scans/goodre.html)