Percy Lubbock in 'The Craft of Fiction'

"As quickly as we read, it melts and shifts in the memory; even at the moment when the last page is turned, a great part of the book, its finer detail, is already vague and doubtful. A little later, after a few days or months, how much is really left of it? A cluster of impressions, some clear points emerging from a mist of uncertainty, this is all we can hope to possess, generally speaking, in the name of a book. The experience of reading it has left something behind and these relics we call by the book's name"