Non esiste in astratto un buon libro: un libro è buono soltanto quando appaga una fame umana, o confuta qualche umano errore. - Christopher Morley

There is no mistaking a real book when one meets it. It is like falling in love, and like that colossal adventure it is an experience of great social import. Even as the tranced swain, the booklover yearns to tell others of his bliss.

For paradise in the world to come is uncertain, but there is indeed a heaven on this earth, a heaven which we inhabit when we read a good book.

They go in not because they need any certain volume but because they feel that there may be some book that needs them.