The Dead Sea is called such because there is no outlet and yet it is saturated with rich mineral deposits.  The Body of Christ (the Church), though rich in many ways, is evangelistically dysfunctional because it stopped giving out what it had received.  When Christ saw that His church had no evangelistic outlet, He threatened to remove her lamp (Revelation 2:5), indicating that the members would lose their light – forfeit its place of light-bearing.