History of the Peloponnesian War

The winter following, upon the great overthrow of the Athenians in Sicily, all the Grecians were presently up against them. Those who before were confederates of neither side thought fit no longer, though uncalled, to abstain from the war, but to go against the Athenians of their own accord, as having not only every one severally this thought, that had the Athenians prospered in Sicily they would afterwards have come upon them also, but imagined withal that the rest of the war would be but short, whereof it would be an honour to participate. And such of them as were confederates of the Lacedaemonians longed now more than ever to be freed as soon as might be of their great toil.

But above all, the cities subject to the Athenians were ready, even beyond their ability, to revolt; as they that judged according to their passion, without admitting reason in the matter, that the next summer they were to remain with victory.