Olynthiac 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 just as in our bodies, so long as a man is in sound health, he is conscious of no pain, but if some malady assails him, every part is set a-working, be it rupture or sprain or any other local affection; even so is it with states and monarchies; as long as their wars are on foreign soil, few detect their weaknesses, but when the shock of battle is on their frontiers, it makes all their faults perfectly clear.