From its birthplace in Judea, Christianity advanced to the conquest of the Roman world. In its primitive form it received an urgency from the belief that the end of all things was close at hand, and that the earth was on the point of being burnt up by fire. From the civil war it waged in Judea, it emerged to enter on a war of invasion and foreign annexation. In succession, Cyprus, Phrygia, Galatia, and all Asia Minor, Greece, and Italy, were penetrated. The persecutions of Nero, incident on the burning of Rome, did not for a moment retard its career; during his reign it rapidly spread, and in every direction Petrine and Pauline, or Judaizing and Hellenizing churches were springing up. The latter gained the superiority, and the former passed away. The constitution of the churches changed, the congregations gradually losing power, which became concentrated in the bishop. By the end of the first century the episcopal form was predominant, and the ecclesiastical organization so imposing as to command the attention of the emperors, who now began to discover the mistake that had hitherto been made in confounding the new religion with Judaism. Their dislike to it, soon manifested in measures of repression, was in consequence of the peculiar attitude it assumed. As a body, the Christians not only kept aloof from all the amusements of the times, avoiding theatres and public rejoicings, but in every respect constituted themselves an empire within the empire. Such a state of things was altogether inconsistent with the established government, and its certain inconveniences and evils were not long in making themselves felt. The triumphant march of Christianity was singularly facilitated by free intercommunication over the Mediterranean, in consequence of that sea being in the hands of one sovereign power. The Jewish and Greek merchants afforded it a medium; their trading towns were its posts. But it is not to be supposed that its spread was without resistance; for at least the first century and a half the small farmers and land labourers entertained a hatred to it, looking upon it as a peculiarity of the trading communities, whom they ever despised. They persuaded themselves that the earthquakes, inundations and pestilences were attributable to it. To these incitements was added a desire to seize the property of the faithful confiscated by the law. Of this the early Christians unceasingly and bitterly complained. But the rack, the fire, wild beasts were unavailingly applied. Out of the very persecutions themselves advantages arose. Injustice and barbarity bound the pious but feeble communities together, and repressed internal dissent. [Sidenote: Defiant air of the young churches.] [Sidenote: Opposition of the emperors.]