History of the Peloponnesian War

"And yet we should recognise the fact that the subject of our conference will not, if we are wise, be our private interests merely, but rather the question whether we shall still be able to save Sicily as a whole, for it is against it, in my judgment, that the Athenians are plotting; and we must consider that we have an argument far more cogent to bring us together on these matters than my words, namely, the Athenians, who possess a military power greater than that of any other Hellenic state and are now at hand with a few ships watching for our mistakes, and under the lawful name of alliance are speciously trying to turn to their own advantage our natural hostility to them.

For if we begin war and call them in—men who of their own accord are ready enough to intrude their forces even on those who do not ask for their intervention—and if we spend our own revenues in doing hurt to ourselves, and at the same time pave the way for their supremacy, we may well expect them, when they see that we are worn out, to come sometime with a larger armament and try to bring everything here under their sway.