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).
But as to the Thebans, he believed—and the event justified him—that in return for benefits received they would give him a free hand for the future and, so far from opposing or thwarting him, would even join forces with him, if he so ordered. Today, on the same assumption, he is doing the Messenians and the Argives a good turn. That, men of Athens, is the highest compliment he could pay you.