This was yesterday's question, but once again I was unable to post on time. I was at my girlfriend's house and she doesn't remember the password for her wireless router...so...yeah, you get two today as well.
My favorite quote is actually is from the preface of the book Les Miserables. I think it pretty much speaks for itself.
"So long as there shall exist, by reason of law and custom, a social condemnation which, in the midst of civilization, artificially creates a hell on earth, and complicates with human fatality a destiny that is divine; so long as the three problems of the century - the degradation of man by the exploitation of his labor, the ruin of women by starvation, and the atrophy of childhood by physical and spiritual night - are not solved; so long as, in certain regions, social asphyxia shall be possible; in other words, and from a still broader point of view, so long as ignorance and misery remain on earth, there should be a need for books such as this."