Croatian native Miroslav Volf is one of the brightest minds in theology today. He took the pledge of allegiance to become a citizen of these United States on Good Friday several years ago. The irony was not lost upon him. But his in-laws sent him a card of congratulations that reminded him of his rightful homelessness. The quotation was from the early second-century church, Epistle of Mathetus to Diognetus: As citizens, Christians share all things with others, and yet endure all things as foreigners. Every foreign land is to them as their native country, and every land of their birth as a land of strangers. . . . They pass their days on earth, but they are citizens of heaven.