All five of these quotes come from a book called The Writer's Quotation Book: A Literary Companion, which was edited by James Charlton.
"If we encounter a man of rare intellect, we should ask him what books he reads." –Ralph Waldo Emerson
"I divide all readers into two classes; those who read to remember and those who read to forget." –William Lyon Phelps
"When you reread a classic you do not see more in the book than you did before; you see more in you than was there before." –Clifton Fadiman
"There are some books of which scores of copies are bought for one which is read, and others which have dozens of readers for every copy sold." –John Ayscough
"The value of great fiction, we begin to suspect, is not that it entertains us or distracts us from our troubles, not just that it broadens our knowledge of people and places, but also that it helps us to know what we believe, reinforces the qualities that are noblest in us, leads us to feel uneasy about our failures and limitations." –John Gardner