History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And yet if the Thebans seem serviceable to you now, we and the rest of the Hellenes were of far greater service to you when you were in greater danger. For now you are attacking others and are a menace to them, but in that crisis, when the barbarian was threatening us all with slavery, these men were on his side.
And it is only fair that you should set our present error, if error there has been, over against the zeal we showed then; if you do, you will find, not only that the zeal outweighs the offence, but also that it was shown at a time when it was a rare thing for Hellenes to oppose their courage to the power of Xerxes. At that time the greater praise was given to those who, instead of intriguing in security for their own advantage with reference to the invasion,[*](As the Thebans did. If αὐτοῖς be read, with nearly all MSS., it must be construed with ἔφοδον, “working to further the invasion of the enemy.”) were ready to hazard the noblest course though fraught with danger.
With these we took our stand and were honoured among the foremost; but now, for the same conduct, we fear lest we are to be destroyed, in that we have chosen the Athenians from regard to right rather than you for profit.
And yet you ought to show yourselves consistent, giving the same judgment concerning the same things, and to consider your true advantage to be only this—to cherish an ever-enduring gratitude toward the best of your allies for their valour, while also securing what may be to your advantage at the present moment.