History of the Peloponnesian War

But what especially and most immediately alarmed them, was the thought that the enemy would venture, on the strength of their victory, to sail straightway to the attack of their port Piraeus, while it had no ships for its protection;

and they supposed that they were already all but there. And indeed, if they had been more bold, they might easily have done that, and so have either divided the city still more than ever, by lying near it, or if they had remained and blockaded it, have compelled the fleet in Ionia, though opposed to the oligarchy, to come to the rescue of their own relatives and the whole city; and in the mean time the Hellespont would have been theirs, with Ionia, the islands, every thing as far as Euboea, in a word, the whole empire of Athens.

But it was not on this occasion, but on many others also, that the Lacedaemonians proved themselves most convenient people for the Athenians to be at war with. For by being very widely different in character—the one people being quick, and the other slow; the one enterprising, and the other unadventurous—they presented very many advantages, especially in the case of a naval empire. A proof of this was given by the Syracusans; for they, through being of a congenial disposition, were also most successful in carrying on war with them.