History of the Peloponnesian War

but bringing yourselves in feeling as near as possible to the actual state of suffering, and reflecting how you would in that case have valued their subjection above every thing, now pay them back in return, not indulging in weakness at the present moment, nor forgetting the danger which once hung over you. Punish these men, I say, as they deserve; and give a striking example to the rest of your allies, that whoever revolts will pay the penalty for it with his life. For if they know this, you will less frequently have to neglect your enemies, while you are fighting with your own confederates.