Tacitus, The Histories — Book 2 (1876)
“ The conquered are fired to valour by anger, by hatred, by the desire of vengeance, while the conquerors are losing their energy in pride and insolence. War will of itself discover and lay open the hidden and rankling wounds of the victorious party. And, indeed, your vigilance, economy, and wisdom, do not inspire me with greater confidence of success than do the indolence, ignorance, and cruelty of Vitellius. Once at war, we have a better cause than we can have in peace, for those who deliberate on revolt have revolted already. ”
