The weakness of all such estimates of Tacitus lies in their failure to recognise the complex nature of the man, the mingled and crossing influences of training, official experience, social environment, and lofty moral ideals(119); it lies even more in a misconception of his aims as a historian. Tacitus was a great orator, and the spirit of the rhetorical school, combined with the force and dexterity of style which it could communicate, left the greatest Roman historians with a less rigorous sense of truth than their weakest modern successors often possess.(120) No Roman ever rose to the Thucydidean conception of history. Moreover Tacitus, although originally not of the highest social rank,(121) belonged to the aristocratic class by sympathy and associations. Like Suetonius, he necessarily drew much of his information from the memories of great houses and the tales of the elders who had lived through the evil days.(122) He acquired thus many of the prejudices of a class which, from its history, and still more from its education, sought its ideals in the past rather than in the future. He mingled in those circles, which in every age disguise the meanness and bitterness of gossip by the airy artistic touch of audacious wit, polished in many social encounters. He had himself witnessed the triumph of delation and the cold cruelty of Domitian. He had shared in the humiliation of the Senate which had been cowed into acquiescence in his worst excesses. And the spectacle had inspired him with a horror of unchecked power in the hands of a bad man, and a gloomy distrust of that human nature which could sink to such ignoble servility.(123) Yet on the other hand Tacitus had gained practical experience in high office, both as soldier and administrator, which has always a sobering effect on the judgment. He realised the difficulties of government and the unreasonableness of ordinary men. Hence he has no sympathy with a doctrinaire and chimerical opposition even under the worst government.(124) However much he might respect the high character of the philosophic enthusiasts of the day, he distrusted their theatrical defiance of power, and he threw his shield over a discreet reserve, which could forget that it was serving a tyrant in serving the commonwealth.(125) Tacitus may at times express himself with a stern melancholy bitterness, which might at first seem to mark him as a revolutionary dreamer, avenging an outraged political ideal. Such an interpretation would be a grave mistake, which he would himself have been the first to correct. The ideal which he is avenging is not a political, but a moral ideal.(126) The bitter sadness is that of the profound analyst of character, with a temperament of almost feverish intensity and nervous force. The interest of history to Thucydides and Polybius lies in the political lessons which it may teach posterity. Its interest to Tacitus lies in the discovery of hidden motives and the secret of character, in