1 Corinthians 1:31

That, according as it is written, He that glorieth, let him glory in the Lord (KJV)

Then: Finally, the good news. The Corinthians can get themselves out of the problem of dissenting and contentious factions. These are Paul's directions. If they will look outside themselves to see the Lord -- his purposes, his plans, his work, his triumphs, his glory, then all will change. They need to take pride in the Lord. Then, dissensions will disintegrate. God will be praised. And the Lord will be pleased.

Commentators remember Jeremiah 9:23-24 and expect that the Corinthians also checked out Jeremiah's teachings (Fitzmyer p. 165).

Now: This is on-going advice. What saved the Corinthian church from slipping even deeper can save today's believers. His glory should ever be in our mind. To complain about the actions of others or to think that one group of believers is greater than another gives God no pleasure. Rather, all should boast in the actions of the Lord. Note the good actions of others. Forgive when forgiveness is needed and continue to serve the Savior. Be thankful for all service which brings glory to the Lord and work to do likewise.

Extra source: First Corinthians: a new translation with introduction and commentary Joseph A. Fitzmyer (New Haven CT: Yale University Press, c2008). http://books.google.com/books?id=W3b-mWk1SxoC&dq=Corinthians+introduction&printsec=frontcover&source=bl&ots=fMjYisa8HV&sig=5Pr-s91r1P4zUIBQyyXFDX6IlP8&hl=en&ei=uqUBS76pK9KGlAfEg52ZCw&sa=X&oi=book_result&ct=result&resnum=6&ved=0CBQQ6AEwBThG#v=onepage&q=&f=false