History of the Peloponnesian War

You will not be the first to break a treaty which the god, in advising us to go to war, judges to be violated already, but rather to support a treaty that has been outraged: indeed, treaties are broken not by resistance but by aggression.

Your position, therefore, from whatever quarter you may view it, will amply justify you in going to war; and this step we recommend in the interests of all, bearing in mind that identity of interests is the surest of bonds whether between states or individuals. Delay not, therefore, to assist Potidaea, a Dorian city besieged by Ionians, which is quite a reversal of the order of things; nor to assert the freedom of the rest. It is impossible for us to wait any longer when waiting can only mean immediate disaster for some of us, and, if it comes to be known that we have conferred but do not venture to protect ourselves, like disaster in the near future for the rest.