History of the Peloponnesian War

It was in this way that we acquired our empire—both we and all others that have ever won empire—by coming zealously to the aid of those, whether barbarians or Hellenes, who have at any time appealed to us; whereas, if we should all keep quiet or draw distinctions of race as to whom we ought to assist, we should add but little to our empire and should rather run a risk of losing that empire itself.

For against a superior one does not merely defend oneself when he attacks, but even takes precaution that he shall not attack at all. And it is not possible for us to exercise a careful stewardship of the limits we would set to our empire; but, since we are placed in this position, it is necessary to plot against some and not let go our hold upon others, because there is a danger of coming ourselves under the empire of others, should we not ourselves hold empire over other peoples.

And you cannot regard a pacific policy in the same light as other states might, unless you will change your practices also to correspond with theirs.[*](The other Hellenic states, it would seem, were preaching the doctrine of non-interference or self-determination; Athens, according to Alcibiades, cannot accept this doctrine without accepting the consequences and relinquishing her empire.)“Calculating, then, that we shall rather strengthen our power here if we go over there, let us make the voyage, that we may lay low the haughty spirit of the Peloponnesians, as we shall if we let men see that in contempt of our present peaceful condition[*](Which was in reality an armed truce renewable every ten days.) we even sail against Sicily;

and that we may, at the same time, either acquire empire over all Hellas, as in all probability we shall, when the Hellenes there have been added to us, or may at least cripple the Syracusans, whereby both ourselves and our allies will be benefited.