Philippic 2
Demosthenes
Demosthenes. Vol. I. Olynthiacs, Philippics, Minor Public Speeches, Speech Against Leptines, I-XVII, XX. Vince, J. H., translator. Cambridge, MA: Harvard University Press, 1930 (printing).
For my part I do not believe that Philip, if he acted in the first place reluctantly and under compulsion, or if he were now inclined to throw the Thebans over, would be persistently opposing their enemies. But if we may judge from his present conduct, it is plain that on that occasion also he acted from deliberate choice, and everything, if correctly observed, points to the fact that all his intrigues are directed against Athens.
And today at any rate this policy is in a measure forced upon him. For observe! He wants to rule, and he has made up his mind that you, and you only, are his rivals. He has long injured you; of nothing is he more conscious than of that. For it is by holding the cities which are really yours that he retains safe possession of all the rest, and he feels that if he gave up Amphipolis and Potidaea, his own country would not be safe for him.
He knows, then, these two facts—that he is intriguing against you and that you are aware of it. Assuming that you are intelligent, he thinks you are bound to hate him, and he is on the alert, expecting some blow to fall, if you can seize an opportunity and if he cannot get in his blow first.