The difference between Christians and the rest of men is neither in country, nor in language, nor in customs…. They dwell in their own fatherlands, but as temporary inhabitants. They take part in all things as citizens, while enduring the hardships of foreigners. Every foreign place is their fatherland, and every fatherland is to them a foreign place. Like all others, they marry and beget children; but they do not expose their offspring. Their board they set for all, but not their bed. Their lot is cast in the flesh; but they do not live for the flesh. They pass their time on earth; but their citizenship is in heaven. They obey the established laws, and their private lives they surpass the laws.
“Letter to Diognetus” c 125/200 AD
Via Bishop Melchisedek