Septimius Severus having destroyed the rivals who competed with him for what was now become the great object of a successful general's ambition, based his power avowedly on the sword. The secret of empire which he transmitted to his children was to foster and indulge the army, and to disregard all else. The senate, the representative of legal power, he despised and decimated. He died in 211, not before his eldest son had already lifted his hand against him, and the four princes of his house all perished by the sword, one by the hand of a brother, the other three by revolted soldiers. In the seventy-three years which elapse from his death to the accession of Diocletian twenty-five emperors are acknowledged at Rome, of whom twenty-three come to an end by violent deaths, almost always by insurrections of soldiers, under instigation of ambitious officers. Besides these, eight associates of the empire, and nineteen [pg 310] generals who during the reign of Gallienus assume the purple in various provinces, are all slain. During eighty-two years Trajan, Hadrian, Antoninus, and Marcus, all at a mature time of life, adopted by the actual ruler to succeed, had governed a stable empire: but now it passes within a shorter period of time, the term of a single human life, nay a term in one case embraced by a single reign,[270] into twenty-five different hands. And indeed it seemed after the capture of the Emperor Valerian by the Persians, as if that great confederacy, which had just celebrated the thousandth anniversary of the imperial city's foundation, was about to break up and be resolved into its component parts. At one moment two great princesses, Victoria and Zenobia, worthy even by the avowal of Romans to wear the Roman diadem, were on the point of establishing the one an empire of the Gauls in the West, the other an empire of the East embracing just those countries which Antony had ruled with Cleopatra at his side. A succession of great generals, all from the province of Illyricum, at last saves the empire and reasserts its unity. But the forty-nine years following the murder of Alexander Severus are filled by the struggles of twenty sovereigns and nineteen pretenders to sovereignty, scarcely any of whom reign so much as five years. Many of them are rulers of great ability and remarkable energy. Claudius, [pg 311] Aurelian, Probus, and Carus, and perhaps Decius, required but happier circumstances to be emperors whose fame would have matched that of Trajan or Hadrian: but their short tenure of power, occupied with the vast effort to restore unity and beat back the barbarian, prevented their doing more than preserve the imperial power and the empire itself. This whole time, then, in civil society was one of fluctuation, anxiety, disaster, alarms from beyond the frontiers and anarchy within them. The Roman peace seemed departing, and the majesty of the empire irreparably violated. Men could not tell what the morrow would bring forth. The fairest cities of the Roman world, Alexandria and Antioch, narrowly escaped perishing through internal discord or hostile surprise. Greece and Asia Minor, after reposing for centuries under the safeguard of the Roman name, found themselves swept through and desolated by barbarian hordes. Italy itself was in imminent danger of the same lot. Towards the end of this period the senate by the election of Tacitus seems to make what may be termed its final effort to assert itself as the depository of legitimate power, the representative of civil society: and this time of confusion issues in a rejection of any such claim, and the establishment of unlimited despotism in the empire as reconstituted by Diocletian. To these straits, then, the first great and haughty enemy of the Christian Church was reduced, so that the power [pg 312] which a century before could look down with proud indifference on the sufferings of Christians now seemed to tremble for its own existence. And in such a condition of human society the great advance of the Church was carried on.

2. But beyond the empire to the north, advancing upon it like the multitudinous waves of the ocean on an exposed coast, lay the ever-battling legions of the northern tribes in their three great divisions of the Teutonic, Slavic, and Finnish races. If Roman society suffered throes of distress, its condition was peace compared with the instability which may be said to have been the very life of these tribes. Once at least in every century they gather themselves up for a concentrated effort against the empire whose rich civilisation lies stretched out before them as a continual prey. After the failure of Arminius to construct a German kingdom, and of Marobod to construct a Suevian, in the time of Augustus, Decebalus, in the time of Trajan, makes another effort in behalf of his Dacians. But here the great Roman general forces barbarism to retreat, and plants a fresh citadel in its very stronghold by establishing a province north of the Danube. Then there is comparative tranquillity for sixty years. It seems as if these two generations were offered by divine Providence to the empire yet in its unbroken strength as a time for its pacific conversion, which if it had accepted, the eruption of the northern [pg 313] nations might for ever have been kept back by the unity which religious conviction would have bestowed on civilisation, and the fresh and living force which it would have imparted to society not yet exhausted by despotic power. But with Marcus Aurelius the empire turns definitively away. A new religious revolution under Odin in Scandinavia had wakened up with redoubled force the destroying energy of barbarism. The Goths had migrated from Sweden to the Black Sea; all the tribes in the interval had been displaced and dashed upon each other by this removal. The war of the Marcomans occupied during eighteen years, from 162 to 180, the whole forces of the empire; Rome was obliged even to arm its slaves, and Italy feared an invasion more terrible than that of the Cimbri, which it cost Marcus Aurelius his life to avert.

Again, during the captivity of Valerian, another grand assault of the northern tribes takes place. The Franks attack western, the Alamans eastern Gaul; they pass the Alps and advance to Ravenna, while Alamans and Sarmatians throw themselves upon Pannonia, and the Goths seize upon Thrace and Greece. The emperors Claudius, Aurelian, and Probus are the saviours of Rome from this new flood. Of the last of these it is recorded that he dealt successively with Franks, Burgundians, Alamans, Vandals, the Bastarnæ, and the whole barbarian brood: and seventy cities [pg 314] raised from their ruins, and fortifications repaired upon a line of fifteen hundred miles, were the fruits of his victories.[271]

So much for the north: while on the east the Persian empire, hereditary foe of the Roman name, had found a new and more vigorous master in the race of the Sassanidæ, who took the religion of Zoroaster to reanimate the national spirit. Ardeschir claimed once more the whole realm which Cyrus and Darius had ruled. Henceforth the Romans had a neighbour more than ever threatening their eastern frontier, and never to be wholly subdued, until the empire of Mohammed arose to detach a great part of their dominion, and to move with redoubled force upon what remained.

To the south of the Roman provinces in Africa were tribes at least as savage as those of the north. Thus the whole empire was enringed with enemies: on the east an opposing civilisation and religion; on the north and south barbarian tribes in perpetual confusion and conflict with each other. Such was the great realm of disorder which surged and heaved to the north and south of the empire; and such the second great enemy which in future times was to occupy the Christian Church, and at present offered the strongest contrast to that moral polity of peace and goodwill, of loyal submission, patient endurance, and heroic fortitude, which was spreading daily in the empire.

3. But there was yet another enemy within the empire itself, which from the beginning tracked the footsteps of the Church, grew with its increase, and everywhere attempted to dissolve its organisation and weaken its influence. The whole second century is occupied with the rise and tangled growth of the Gnostic sects. But these were not alone. From the very time of the Apostles we find the evidence of a number of sects, rising and falling, preying on and devouring each other, none without some portion of Christian truth, on which it feeds, blended with Jewish, Greek, Oriental, Egyptian, Libyan notions, prejudices, and errors; domiciled in various parts of the empire in accordance with the national or local character which they represent. They reproduce with a Christian colour the sects and the sect-life of the Greek schools of philosophy. As the wheat has its proper weed, which springs up in the midst of it and counterfeits it, so error, everywhere gathering round some portion of truth, forms itself into an antagonistic life. The force and truth of the Christian Church were shown not in the absence of these rivals, but in its triumph over their variety, in its remaining one whilst they diverged endlessly from that unchanging original type, in its continuous and uniform growth whilst they rose and fell, domineered in certain times and places, and then disappeared. In this its course the Church had to master very great difficulties, which were inherent [pg 316] in the manner of its rise. It had to remain one society in spite of the isolation and self-government of its local portions. It possessed in each place but a feeble minority of members compared with the mass of unbelievers. Against its assimilating power was ranged the force of national feelings which underlay the Roman authority throughout the whole empire. It had to deal entirely by moral means with the full liberty of error to which its adherents were exposed. Lastly, it had to do all this amid the continual strain of threatened or actual persecution, a state which at its best was one of insecurity, and which any local trouble, the ill-will of a mob, the greed or ambition or fear of provincial rulers, not to speak of the imperial state-policy, might turn into the pressure of severe suffering.

In the face of such difficulties, if the Christian Church continued one in its doctrine, organisation, and manner of life, such unity was assuredly the proof of a divine power residing it.

I shall now proceed to show by the testimony of eye-witnesses that such unity was its distinguishing characteristic.

Now there was not a race or a religion in all this Roman empire, endless as the races and religions comprehended in it were, out of which individuals were not drawn into the bosom of the one great Christian society; and yet within this there was a perfect union of all hearts and minds in the [pg 317] conviction that the multitude so collected was one people apart from all other peoples. And this conviction is itself the great marvel. How was it wrought? For it was an utterly new thing upon the earth. The union of race, language, and locality, with which sameness of religion was usually interwoven, had been hitherto the bond of such nations as had as yet existed. The great city itself had sprung up and flourished by the strict union of these four things. After its career of foreign conquest had substituted for the government of a city the great Roman confederation, it had indeed, like the preceding world-empires, in fact disregarded all these, being supported by a force independent of them all. But that force was material power. The great statue was of iron. It was a novelty unheard of as yet among the gentiles and unimagined by poet or philosopher, to create a polity which, disregarding sameness of race, of language, and of locality, should exist and maintain itself throughout the whole earth solely by the force of faith and charity.

Such was the idea of Christians about themselves from the beginning. The idea preceded the fact. The prophets foretold it; the Apostles proclaimed it:[272] let us observe the fulfilment of the prophecy and the proclamation. We will take our stand in the middle of the third century, when [pg 318] seven full generations have passed since the day of Pentecost. In this time a people has been formed. Already a hundred and fifty years before an eyewitness among themselves had observed the nature of this people. “Christians are not distinguished from other men either by country, or by language, or by customs: for they have no cities peculiar to themselves, nor any language different from others, nor singularity in their mode of life.... But they dwell both in Greek and in barbarous cities, as the lot of each may be, following local customs as to raiment and food, and the rest of their life, but exhibiting withal a polity of their own, marvellous and truly incredible. They dwell in their own country, but it is as sojourners; they share in everything as citizens, yet suffer everything as strangers. Every foreign land is to them a country, and every country a foreign land.... In a word, what the soul is in the body, that Christians are in the world. The soul is diffused through all the limbs of the body, and Christians through all the cities of the world.... The soul is shut within the body, of which it is the bond, and Christians are like a garrison in the world, which they hold together.”[273]