Only those books come down which deserve to last . All the gilt edges, vellum and morocco, all the presentation copies to all the libraries will not preserve a book in circulation beyond its intrinsic date.
If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
As the biggest library if it is in disorder is not as useful as a small but well-arranged one, so you may accumulate a vast amount of knowledge but it will be of far less value than a much smaller amount if you have not thought it over for yourself.