I love this quote from Introduction to Public Librarianship (pg. 192):
"The shaping of collections that will cause this intake of breath, this rescued memory is a trust that the public grants librarians."
That quote was in response to an observation by Alberto Manguel:
We read in slow, long motions, as if drifting in space, weightless. We read full of prejudice, malignantly. We read generously, making excuses for the text, filling gaps, mending faults. And sometimes, when the stars are kind, we read with an intake of breath, with a shudder, as if someone or something had "walked over our grave," as if a memory had suddenly been rescued form a place deep within us–the recognition of something we never knew was there, or of something we vaguely felt as a flicker or a shadow, whose ghostly form rises and passes back into us before we can see what it is, leaving us older and wiser. [From A History of Reading. 1996]
Introduction to Public Librarianship goes on to state: "Public librarians serving adults should know the history of reading and reading culture to be able to strike a balance between popular books and the classic and meaningful books that lead to introspection and understanding."
That statement follows a quote from Vivian Gornick, an American critic, essayist and memoirist: "I cannot help thinking, 50 years ago in the Bronx, if the library had responded to my needs instead of shaping my needs, what sort of reader would I have become."
The Gornick quote is from a New York Times article, published February 20, 1998 and titled My City: Apostles of the Faith that Books Matter.