So long as chiliastic expectations were the basis of the Christian’s hope and his judgment of the order of this present world, the Christian felt that he was but a stranger and sojourner in the world, and that his real home was the kingdom of Christ, soon to be established here on earth. With such a view the Christian would naturally define his relation to the world as being in it, yet not of it. As time passed, the opinion became more common that the kingdom of Christ was not a future world-order to be set up on His return, but the Church here on earth. This thought, which is the key to the _City of God_ by St. Augustine, was not to be found in the first century and a half of the Church. _Ep. ad Diognetum_, 5, 6. The Epistle to Diognetus is one of the choicest pieces of ante-Nicene literature. Although it is commonly included among the Apostolic Fathers, the date is uncertain, it is anonymous, and the reason for its inclusion is not clear. The weight of opinion is in favor of an early date. It was preserved in but one manuscript, which was unfortunately destroyed in 1870. The main themes of the epistle are the faith and manners of the Christians, and an attempt to explain the late appearance of Christianity in the world. The work, therefore, is of the nature of an apology, and should be compared with _The Apology of Aristides_. A translation of the epistle may be found in ANF, I, 23. Ch. 5. The Christians are distinguished from other men neither by country, nor language, nor the customs which they observe. For they neither inhabit cities of their own, nor employ a peculiar form of speech, nor lead a life which is marked out by any singularity. The course of conduct which they follow has not been devised by any speculation or deliberation of inquisitive men; nor do they, like some, proclaim themselves the advocates of any merely human doctrines. But, inhabiting Greek as well as barbarian cities, according as the lot of each of them has been determined, and following the customs of the natives in respect to clothing, food, and the rest of their ordinary conduct, they display to us their wonderful and confessedly striking method of life. They dwell in their own countries, but simply as sojourners. As citizens, they share in all things with others, and yet endure all things as if foreigners. Every foreign country is to them as their native land, and every land of their birth as a land of strangers. They marry as do all; they beget children; but they do not commit abortion. They have a common table, but not a common bed. They are in the flesh, but they do not live after the flesh. They pass their days on earth, but they are the citizens of heaven. They obey the prescribed laws, and at the same time surpass the laws by their lives. They love all men, and are persecuted by all. They are unknown and condemned; they are put to death and restored to life. They are poor, yet they make many rich;