History of the Peloponnesian War

"We should be convinced, however, that it is not for our own separate interests alone, if we are wise, that this congress will be held; but to consider whether we shall be able any longer to save the whole of Sicily, which, as I conceive, is the object of the machinations of the Athenians. And we should regard that people as much more compulsory mediators in such case than my words; who, possessing as they do the greatest power of all the Greeks, are watching our blunders, being here with a few ships; and under the legitimate name of alliance are speciously bringing to a profitable conclusion their natural hostility to us.

For if we go to war, and call them in to our aid, men who of their own accord turn their arms even upon such as do not call them in; and if we injure ourselves by means of our own resources, and at the same time pave the way for their dominion: it is probable that when they observe us worn out, they will come hereafter with a great force, and endeavour to bring all these states into subjection to them.