What Clark means is that libraries have shifted from simply being storehouses of books to a medium to help "bridge the gap between the haves and the have-nots".

Every American who hopes to "make it" also knows the fear of failure, because the myth of success inevitably implies comparison between the haves and the have-nots, the stars and the anonymous crowd.

Paul is addressing two different kinds of people in this very chapter some of them have — in fact he calls them the haves and the have-nots that's the Greek he USES.