Plataicus (36-40)

But assuredly they cannot again take refuge in your city either, Athenians, the city which they will be discovered to have so consistently betrayed. It is inconceivable, therefore, that they will care to get into a quarrel with you over an alien city[*] and on that account so rashly and so inevitably to lose their own; on the contrary, in all their dealings with you they will behave in much more seemly fashion, and the more they fear for themselves the more they will cultivate your friendship.

Indeed they have proved to you how people of such character should be treated by their conduct in the matter of Oropus[*]; for when they hoped that they would have license to do as they pleased they did not treat you as allies, but as ruthlessly wronged you as they would have dared to act against their deadliest enemies. But as soon as you in requital voted to exclude them from the peace,[*] they left off their arrogance and came to you in more humble mood than we Plataeans are in now.

If, then, some of their orators seek to frighten you, arguing that there is danger of the Thebans’ changing sides and going over to the enemy, you must not credit what they say; for they are constrained by compulsions so peremptory that they would much sooner submit to your government than tolerate the alliance with the Lacedaemonians.

But even if they were likely to act altogether otherwise, not even then, in my opinion, does it become you to have greater regard for the city of the Thebans than for your oaths and treaties, when you remember, first, that it is your ancient tradition to fear, not dangers, but acts of infamy aid dishonor; next, that it usually happens that victory in war is not for those who destroy cities by violence, but for those who govern Greece in a more scrupulous and clement manner.[*]

And this could be proved by numerous instances; but as for those which have occurred in our own time at any rate, who does not know that the Lacedaemonians shattered your power,[*] which was thought to be irresistible—although at first they possessed slight resources for the war waged at sea, but they won the Greeks over to their side because of that general belief—and that you in turn took the leadership away from them, although you depended on a city without walls and in evil plight,[*] but possessed Justice as your ally?