Marking a book is literally an experience of your differences or agreements with the author. It is the highest respect you can pay him.
Edgar Allan PoeTo see distinctly the machinery--the wheels and pinions--of any work of Art is, unquestionably, of itself, a pleasure, but one which we are able to enjoy only just in proportion as we do not enjoy the legitimate effect designed by the artist.
Edgar Allan PoeCeux qui revent eveilles ont conscience de 1000 choses qui echapent a ceux qui ne revent qu'endormis. The one who has day dream are aware of 1000 things that the one who dreams only when he sleeps will never understand. (it sounds better in french, I do what I can with my translation...)
Edgar Allan Poe