On the Embassy (316-320)

But as soon as he was visited by us ambassadors, he promptly took Aeschines into his pay, that he might support and co-operate with the infamous Philocrates, and overpower those of us whose intentions were honest. He then composed a letter to you, as the best means of obtaining the peace he desired.

Even then it was still out of his power to achieve any important result to your disadvantage, unless he should destroy the Phocians. That was no easy task, for, as luck would have it, his affairs had reached a crisis of such a nature that either he could not realize any of his purposes, or else he was obliged to commit falsehood and perjury, with the whole world, both Greek and barbarian, to witness his wickedness.

For if he should accept the Phocians as allies, and with your help take the oath of friendship to them, he must at once violate the oaths he had already sworn to the Thessalians and the Thebans, with the latter of whom he had covenanted to help them in the subjugation of Boeotia, and with the former to restore their rights at the Amphictyonic Council. If, on the other hand, he was loth to accept them—and in fact the prospect did not please him—he expected that you would send troops to Thermopylae to stop his passage, as indeed you would have done if you had not been outwitted. In that event, he calculated that he would be unable to get through.

He did not need any information from others to reach that conclusion. He was himself a sufficient witness, for, after his first defeat of the Phocians and the overthrow of their leader and commander Onomarchus, although no one in the whole world, Greek or barbarian, sent aid to them save you alone, so far from getting through Thermopylae, or accomplishing any of the purposes of the passage, he had been unable even to approach the pass.

I take it he was perfectly well aware that now, with Thessaly at variance with him—the Pheraeans, for example, refusing to join his following—with the Thebans getting the worst of the war, defeated in an engagement, and a trophy erected at their expense, he would be unable to force the passage if you sent troops to Thermopylae, and that he could not even make the attempt without serious loss unless he should also resort to some trickery. How, then, he thought, shall I escape open falsehood, and attain all my objects without incurring the charge of perjury? Only if I can find Athenians to hood-wink the Athenian people, for then I shall have no share in the ensuing dishonor.