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).
And all these are wrought by hand and entail expense. But there is one common bulwark which the instinct of sensible men possesses within itself, a good and safe one for all, but invaluable for democracies against tyrants. And what is that bulwark? It is mistrust. Guard that; hold fast to that. If you preserve it, no harm can touch you.