History of the Peloponnesian War

And it is the custom of this country of yours, when a foreign enemy comes against you, to fight with him both on your own and on your neighbour's ground alike; but much more you ought to do it against the Athenians when they be borderers.

For liberty with all men is nothing else but to be a match for the cities that are their neighbours. With these, then, that attempt the subjugation not only of their neighbours, but of estates far from them, why should we not try the utmost of our fortune? We have for example the estate that the Euboeans over against us, and also the greatest part of the rest of Greece, do live in under them. And you must know that though others fight with their neighbours about the bounds of their territories, we, if we be vanquished, shall have but one bound amongst us all, so that we shall no more quarrel about limits.