1 Corinthians 5:10

Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world (KJV)

Then: Paul clarifies for the Corinthians that it would be absurd to think they could completely dissassociate themselves from every transgressor because they still live on earth. There is nowhere anyone can go to find a place where people who sin do not live. Hayes (p. 87-88) likes fellow commentator Brian Rosner's observation that every transgression in the list relates to one in Dueteronomy which requires death by stoning. The list is not random; in Old Testament days the whole community was obligated to participate in a process of judgement. Paul wants the church to remember their responsibility did not come out of thin air, but was grounded in former biblical standards of action.

Now: Hayes (p. 92) concludes a discussion of chapter five with a current question about modern society's taking the path of the Corinthians. Often freedom in Christ becomes latitude to ignore collected biblical principles and behave licentiously. There is a direct correlation between elite sophists and enlightened "moral" norms.

Extra Source: First Corinthians by Richard B. Hayes (John Knox Press, 1997) on line athttp://books.google.com/books?id=M_PC0PAs3VYC&dq=1+Corinthians+and+Richard+B.+Hays&printsec=frontcover&source=in&hl=en&ei=2oPcStDCIIvf8Aaq0Ki3BQ&sa=X&oi=book_result&ct=result&resnum=11&ved=0CCMQ6AEwCg#v=onepage&q=1%20Corinthians%20and%20Richard%20B.%20Hays&f=false