History of the Peloponnesian War

The result is that our city is rarely at rest, but is subject to constant troubles and to contests as frequent against herself as against the enemy, not to speak of occasional tyrannies and infamous cabals.

However, I will try, if you will support me, to let nothing of this happen in our time, by gaining you, the many, and by chastising the authors of such machinations, not merely when they are caught in the act—a difficult feat to accomplish—but also for what they have the wish though not the power to do; as is necessary to punish an enemy not only for what he does, but also beforehand for what he intends to do, if the first to relax precaution would not be also the first to suffer. I shall also reprove, watch, and on occasion warn the few—the most effectual way, in my opinion, of turning them from their evil courses.