….A very long time ago, when Christians were a persecuted minority of maybe fifty thousand in the great empire of Rome, an anonymous writer explained to a pagan named Diognetus the way it is with this peculiar people. Until Our Lord returns in glory, Christians do well to embrace the second century “Letter to Diognetus” as their vade mecum:
For Christians cannot be distinguished from the rest of the human race by country or language or customs. They do not live in cities of their own; they do not use a peculiar form of speech; they do not follow an eccentric manner of life. This doctrine of theirs has not been discovered by the ingenuity or deep thought of inquisitive men, nor do they put forward a merely human teaching, as some people do. Yet, although they live in Greek and barbarian cities alike, as each man’s lot has been cast, and follow the customs of the country in clothing and food and other matters of daily living, at the same time they give proof of the remarkable and admittedly extraordinary constitution of their own commonwealth. They live in their own countries, but only as aliens. They have a share in everything as citizens, and endure everything as foreigners. Every foreign land is their fatherland, and yet for them every fatherland is a foreign land. They marry, like everyone else, and they beget children, but they do not cast out their offspring. They share their board with each other, but not their marriage bed. It is true that they are ‘in the flesh,’ but they do not live ‘according to the flesh.’ They busy themselves on earth, but their citizenship is in heaven.