In the development of religion and philosophy no new element appeared during this epoch. The Romano-Hellenic state-religion and the Stoic state-philosophy inseparably combined with it were for every government - oligarchy, democracy or monarchy - not merely a convenient instrument, but quite indispensable for the very reason that it was just as impossible to construct the state wholly without religious elements as to discover any new state-religion fitted to take the place of the old. So the besom of revolution swept doubtless at times very roughly through the cobwebs of the augural bird-lore[1]; nevertheless the rotten machine creaking at every joint survived the earthquake which swallowed up the republic itself, and preserved its insipidity and its arrogance without diminution for transference to the new monarchy. As a matter of course, it fell more and more into disfavour with all those who preserved their freedom of judgment. Towards the state-religion indeed public opinion maintained an attitude essentially indifferent; it was on all sides recognized as an institution of political convenience, and no one specially troubled himself about it with the exception of political and antiquarian literati. But towards its philosophical sister there gradually sprang up among the unprejudiced public that hostility, which the empty and yet perfidious hypocrisy of set phrases never fails in the long run to awaken. That a presentiment of its own worthlessness began to dawn on the Stoa itself, is shown by its attempt artificially to infuse into itself some fresh spirit in the way of syncretism. Antiochus of Ascalon (flourishing about 675), who professed to have patched together the Stoic and Platonic-Aristotelian systems into one organic unity, in reality so far succeeded that his misshapen doctrine became the fashionable philosophy of the conservatives of his time and was conscientiously studied by the genteel dilettanti and literati of Rome. Every one who displayed any intellectual vigour, opposed the Stoa or ignored it. It was principally antipathy towards the boastful and tiresome Roman Pharisees, coupled doubtless with the increasing disposition to take refuge from practical life in indolent apathy or empty irony, that occasioned during this epoch the extension of the system of Epicurus to a larger circle and the naturalization of the Cynic philosophy of Diogenes in Rome. However stale and poor in thought the former might be, a philosophy, which did not seek the way to wisdom through an alteration of traditional terms but contented itself with those in existence, and throughout recognized only the perceptions of sense as true, was always better than the terminological jingle and the hollow conceptions of the Stoic wisdom; and the Cynic philosophy was of all the philosophical systems of the times in so far by much the best, as its system was confined to the having no system at all and sneering at all systems and all systematizers.

In both fields war was waged against the Stoa with zeal and success; for serious men, the Epicurean Lucretius preached with the full accents of heartfelt conviction and of holy zeal against the Stoical faith in the gods and providence and the Stoical doctrine of the immortality of the soul; for the great public ready to laugh, the Cynic Varro hit the mark still more sharply with the flying darts of his extensively-read satires. While thus the ablest men of the older generation made war on the Stoa, the younger generation again, such as Catullus, stood in no inward relation to it at all, and passed a far sharper censure on it by completely ignoring it.

But, if in the present instance a faith no longer believed in was maintained out of political convenience, they amply made up for this in other respects. Unbelief and superstition, different hues of the same historical phenomenon, went in the Roman world of that day hand in hand, and there was no lack of individuals who in themselves combined both - who denied the gods with Epicurus, and yet prayed and sacrificed before every shrine. Of course only the gods that came from the east were still in vogue, and, as the men continued to flock from the Greek lands to Italy, so the gods of the east migrated in ever-increasing numbers to the west. The importance of the Phrygian cultus at that time in Rome is shown both by the polemical tone of the older men such as Varro and Lucretius, and by the poetical glorification of it in the fashionable Catullus, which concludes with the characteristic request that the goddess may deign to turn the heads of others only, and not that of the poet himself.

A fresh addition was the Persian worship, which is said to have first reached the Occidental through the medium of the pirates who met on the Mediterranean from the east and from the west; the oldest seat of this cultus in the west is stated to have been Mount Olympus in Lycia. That in the adoption of Oriental worships in the west such higher speculative and moral elements as they contained were generally allowed to drop, is strikingly evinced by the fact that Ahuramazda, the supreme god of the pure doctrine of Zarathustra, remained virtually unknown in the west, and adoration there was especially directed to that god who had occupied the first place in the old Persian national religion and had been transferred by Zarathustra to the second - the sun-god Mithra.

But the brighter and gentler celestial forms of the Persian religion did not so rapidly gain a footing in Rome as the wearisome mystical host of the grotesque divinities of Egypt - Isis the mother of nature with her whole train, the constantly dying and constantly reviving Osiris, the gloomy Sarapis, the taciturn and grave Harpocrates, the dog-headed Anubis. In the year when Clodius emancipated the clubs and conventicles (696), and doubtless in consequence of this very emancipation of the populace, that host even prepared to make its entry into the old stronghold of the Roman Jupiter in the Capitol, and it was with difficulty that the invasion was prevented and the inevitable temples were banished at least to the suburbs of Rome. No worship was equally popular among the lower orders of the population in the capital: when the senate ordered the temples of Isis constructed within the ring-wall to be pulled down, no labourer ventured to lay the first hand on them, and the consul Lucius Paullus was himself obliged to apply the first stroke of the axe(704); a wager might be laid, that the more loose any woman was, the more piously she worshipped Isis. That the casting of lots, the interpretation of dreams, and similar liberal arts supported their professors, was a matter of course. The casting of horoscopes was already a scientific pursuit; Lucius Tarutius of Firmum, a respectable and in his own way learned man, a friend of Varro and Cicero, with all gravity cast the nativity of kings Romulus and Numa and of the city of Rome itself, and for the edification of the credulous on either side confirmed by means of his Chaldaean and Egyptian wisdom the accounts of the Roman annals.

But by far the most remarkable phenomenon in this domain was the first attempt to mingle crude faith with speculative thought, the first appearance of those tendencies, which we are accustomed to describe as Neo-Platonic, in the Roman world. Their oldest apostle there was Publius Nigidius Figulus, a Roman of rank belonging to the strictest section of the aristocracy, who filled the praetorship in 696 and died in 709 as a political exile beyond the bounds of Italy. With astonishing copiousness of learning and still more astonishing strength of faith he created out of the most dissimilar elements a philosophico-religious structure, the singular outline of which he probably developed still more in his oral discourses than in his theological and physical writings.