Tacitus quotes - page 3
The histories of Tiberius, Caius, Claudius, and Nero, while they were in power, were falsified through terror, and after their death were written under the irritation of a recent hatred. Hence my purpose is to relate a few facts about Augustus - more particularly his last acts, then the reign of Tiberius, and all which follows, without either bitterness or partiality, from any motives to which I am far removed.
Tacitus
There is a division of duties between the army and its generals. Eagerness for battle becomes the soldiers, but generals serve the cause by forethought, by counsel, by delay oftener than by temerity. As I promoted your victory to the utmost of my power by my sword and by my personal exertions, so now I must help you by prudence and by counsel, the qualities which belong peculiarly to a general.
Tacitus