History of the Peloponnesian War

Demosthenes thought fit to stay no longer, and since the execution of his design at Epipolae had failed, delivered his opinion for going out of the haven whilst the seas were open and whilst, at least with this addition of galleys, they were stronger than the army of the enemy.

For it was better, he said, for the city to make war upon those which fortify against them at home than against the Syracusians, seeing they cannot now be easily overcome; and there was no reason why they should spend much money in lying before the city. This was the opinion of Demosthenes.

Nicias, though he also thought their estate bad, yet was unwilling to have their weakness discovered, and, by decreeing of their departure openly with the votes of many, to make known the same to the enemy; for if at any time they had a mind to be gone, they should then be less able to do it secretly.

Besides, the estate of the enemy, inasmuch as he understood it better than the rest, put him into some hope that it might yet grow worse than their own, in case they pressed the siege, especially being already masters of the sea, far and near, with their present fleet. There was moreover a party for the Athenians in Syracuse that desired to betray the state into their hands, and that sent messengers unto him and suffered him not to rise and be gone.