After this all prayers were addressed to Tiberius. He, on his part, urged various considerations, the greatness of the empire, his distrust of himself. "Only," he said, "the intellect of the Divine Augustus was equal to such a burden. Called as he had been by him to share his anxieties, he had learnt by experience how exposed to fortune's caprices was the task of universal rule. Consequently, in a state which had the support of so many great men, they should not put everything on one man, as many, by uniting their efforts would more easily discharge public functions." There was more grand sentiment than good faith in such words. Tiberius's language even in matters which he did not care to conceal, either from nature or habit, was always hesitating and obscure, and now that he was struggling to hide his feelings completely, it was all the more involved in uncertainty and doubt. The Senators, however, whose only fear was lest they might seem to understand him, burst into complaints, tears, and prayers. They raised their hands to the gods, to the statue of Augustus, and to the knees of Tiberius, when he ordered a document to be produced and read. This contained a description of the resources of the State, of the number of citizens and allies under arms, of the fleets, subject kingdoms, provinces, taxes, direct and indirect, necessary expenses and customary bounties. All these details Augustus had written with his own hand, and had added a counsel, that the empire should be confined to its present limits, either from fear or out of jealousy.
Tiberius takes the stage again and claims that he doesn't want the full power of Emperor. Only Divine Augustus could possibly handle the authority, he claims. The humility of a new leader is a reoccurring theme in Tacitus. Tacitus mentioned Tiberius' humility in I.7 with more detail as well. Of course, it's all bull. The leader claims a return to republican ways, but ends up acting dictatorial (i.e. the "uniter not a divider' speech). Tacitus is setting the story up with some foreshadowing.
Oddly, though, Tacitus speaks of Tiberius not being able to hide his uncertainty, as if he actually might believe that republican rule is best, or that he just isn't strong enough personally to take control. Could Tiberius really be a reluctant ruler? Well, if he were, it would certainly go against all the grooming by Augustus and the alleged plotting by him and Livia and the murder of Postumus. It seems pretty unlikely. Tiberius' rise was a long, planned ordeal. He knew for a decade he was next in line and was paraded around as the next ruler. On top of this, he was expected to be the ruler by the Claudian faction. Despite Tacitus' claims, uncertainty did not seem to be a real part of the time.
The last two sentences are quite interesting. Augustus first asked for a census to be read of all of Rome's citizens and property. I guess Augustus wanted people to know the state of affairs when he died as a benchmark or so his memory wouldn't be tainted if Tiberius screwed up. Augustus then recommends that there be a maintenance of Pax Romana. Keep the borders of Rome stable. The Julio-Claudians, Tiberius especially, listen to Augustus for the most part.
