History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
And you say that it had been base for you to betray your benefactors; but it was surely far baser and more iniquitous to sacrifice the whole body of the Hellenes, your fellow-confederates, who were liberating Hellas, than the Athenians only, who were enslaving it.
The return that you made them was therefore neither equal nor honorable, since you called them in, as you say, because you were being oppressed yourselves, and then became their accomplices in oppressing others; although baseness rather consists in not returning like for like than in not returning what is justly due but must be unjustly paid.
Meanwhile, after thus plainly showing that it was not for the sake of the Hellenes that you alone then did not Medise, but because the Athenians did not do so either, and you wished to side with them and to be against the rest;
you now claim the benefit of good deeds done to please your neighbors. This cannot be admitted: you chose the Athenians, and with them you must stand or fall. Nor can you plead the league then made and claim that it should now protect you.
You abandoned that league, and offended against it by helping instead of hindering the subjugation of the Aeginetans and others of its members, and that not under compulsion, but while in enjoyment of the same institutions that you enjoy to the present hour, and no one forcing you as in our case. Lastly, an invitation was addressed to you before you were blockaded to be neutral and join neither party: this you did not accept.