The letters he wrote at this time to Atticus, from the shores of the Pomptine Marshes, in the solitude of Astura, apprise us of his most intimate feelings. He gave vent to his sorrow in writing a _Consolatio_, and in its preserved fragments we see him strangely impressed by the Pythagorean doctrines: he speaks of the soul, exempt from all matter, as celestial and divine and therefore eternal, of the soul’s life here below as a penalty inflicted on it because it is born to expiate anterior crimes (_scelerum luendorum causa_). Cicero’s sensitive spirit, troubled by the perplexing problem of our destiny, did not turn to the old discredited beliefs but to the new conceptions which a mystical philosophy had brought from the East. _Hortensius_ and the _Tusculans_, written in this period of his life, show us the empire which the Neo-Stoicism of his master and the Neo-Pythagorism of his fellow-senator then exercised over his mind, saddened and disillusioned as he was, and show us too how he sought consolation for the private and public ills which were overwhelming him in the luminous doctrine of a blissful survival. This spiritual evolution is an image of the great change which was about to take place in the Roman world. * * * * * Stoic philosophy, although its maxims had been popularised by education and literature, was almost as incapable of exercising a wide influence on the deep masses of the people as the esoteric theosophy revealed in the aristocratic conventicles of the Pythagoreans. The urban “plebs,” to which slavery and trade had given a strong admixture of Eastern blood, and the peasants of the rural districts, where the gaps caused by depopulation were filled up by a foreign labour supply, were beginning at the end of the Republican period to hear new dogmas preached, dogmas which were winning an ever increasing number of believers. The ancient national cults of Greece and Rome aimed above all at ensuring civic order and earthly welfare, and paid small regard to the spiritual perfection of individuals and their eternal future. But now exotic cults claimed to reveal the secret of immortality to their adepts.[87] The Oriental mysteries, propagated in the West, united in the promise of securing holiness in this life and felicity in the next, while they imparted to their initiates the knowledge of certain rites and required submission to certain precepts. Instead of the fluctuating and disputable beliefs of philosophers as to destiny in the Beyond, these religions gave certainty founded on divine revelation and on the faith of countless generations attached to them. The truth, which the mysticism of the thinkers looked to find in direct communication with heaven, was here warranted by a venerable tradition and by the daily manifestations of the gods adored. The belief in life beyond the grave, which had in ancient paganism been so vague and melancholy, was