A word from Dr. King...

Every true Christian is a citizen of two worlds, the world of time and the world of eternity.  We are, paradoxically, in the world and yet not of the world.  To the Philippian Christians, Paul wrote, "We are a colony of heaven."  They understood what he meant, for their city of Philippi was a Roman colony.  When Rome wished to Romanize a province, she established a small colony of people who lived by Roman law and Roman customs and who, though in another country, held fast to their Roman allegiance.  This powerful, creative minority spread the gospel of Roman culture.  Although the analogy is imperfect - the Roman settlers lived within a framework of injustice and exploitation, that is, colonialism - the Apostle does point to the responsibility of Christians to imbue an unchristian world with the ideals of a higher and more noble order.  Living in the colony of time, we are ultimately responsible to the empire of eternity.  As Christians we must never surrender our supreme loyalty to any time-bound custom or earth-bound idea, for at the heart of our universe is a higher reality - God and his kingdom of love - to which we must be conformed.

- from Strength to Love, by Martin Luther King, Jr. (page 22)