Athens: Its Rise and Fall Book III Vol II by Edward Bulwer-lytton

I. The first preparations of the Persians did not produce the effect which might have been anticipated in the Grecian states. Far from uniting against the common foe, they still cherished a frivolous and unreasonable jealousy of each other. Several readily sent the symbols of their allegiance to the Persian, including the whole of Boeotia, except only the Thespians and Plataeans. The more timorous states imagined themselves safe from the vengeance of the barbarian; the more resolute were overwhelmed with dismay. The renown of the Median arms was universally acknowledged for in spite of Marathon, Greece had not yet learned to despise the foreigner; and the enormous force of the impending armament was accurately known from the spies and deserters of the Grecian states, who abounded in the barbarian camp.

Even united, the whole navy of Greece seemed insufficient to contend against such a foe; and, divided among themselves, several of the states were disposed rather to succumb than to resist [59]. "And here," says the father of history, "I feel compelled to assert an opinion, however invidious it may be to many. If the Athenians, terrified by the danger, had forsaken their country, or submitted to the Persian, Xerxes would have met with no resistance by sea. The Lacedaemonians, deserted by their allies, would have died with honour or yielded from necessity, and all Greece have been reduced to the Persian yoke. The Athenians were thus the deliverers of Greece. They animated the ardour of those states yet faithful to themselves; and, next to the gods, they were the true repellers of the invader. Even the Delphic oracles, dark and ominous as they were, did not shake their purpose, nor induce them to abandon Greece. " When even the deities themselves seemed doubtful, Athens was unshaken.