Against Philon, On his Scrutiny

For he packed up all his belongings and left the city to live beyond the border, at Oropus, where he paid the aliens’ tax and resided under the protection of a patron, since he preferred the life of an alien among those people to citizenship with us. And so he would not even do as some citizens did, who turned about when they saw the party of Phyle succeeding in their efforts; he did not even think fit to take any share in these successes, but chose to come when the business was achieved rather than join in the return after achieving something for the advantage of the common wealth. For he did not come to the Peiraeus, nor is there any instance of his having placed himself at your disposal.

But I ask you, if on seeing us successful he did not shrink from betraying us, what must he have done to us, had we failed of our object? Now those who were prevented by private calamities from sharing the dangers that then beset the city deserve some indulgence: for misfortune befalls no man of his own will.