History of the Peloponnesian War

It is your national habit, in your country or out of it, to oppose the same resistance to a foreign invader; and when that invader is Athenian, and lives upon your frontier besides, it is doubly imperative to do so.

As between neighbours generally, freedom means simply a determination to hold ones own; and with neighbours like these, who are trying to enslave near and far alike, there is nothing for it but to fight it out to the last. Look at the condition of the Euboeans and of most of the rest of Hellas, and be convinced that others have to fight with their neighbours for this frontier or that, but that for us conquest means one frontier for the whole country, about which no dispute can be made, for they will simply come and take by force what we have.

So much more have we to fear from this neighbour than from another. Besides, people who, like the Athenians in the present instance, are tempted by pride of strength to attack their neighbours, usually march most confidently against those who keep still, and only defend themselves in their own country, but think twice before they grapple with those who meet them outside their frontier and strike the first blow if opportunity offers.

The Athenians have shown us this themselves; the defeat which we inflicted upon them at Coronea, at the time when our quarrels had allowed them to occupy the country, has given great security to Boeotia until the present day.