History of the Peloponnesian War

Meanwhile Corcyra gave the first example of most of the crimes alluded to; of the reprisals exacted by the governed who had never experienced equitable treatment or indeed aught but insolence from their rulers—when their hour came; of the iniquitous resolves of those who desired to get rid of their accustomed poverty, and ardently coveted their neighbors' goods; and lastly, of the savage and pitiless excesses into which men who had begun the struggle not in a class but in a party spirit, were hurried by their ungovernable passions.

In the confusion into which life was now thrown in the cities, human nature, always rebelling against the law and now its master, gladly showed itself ungoverned in passion, above respect for justice, and the enemy of all superiority; since revenge would not have been set above religion, and gain above justice, had it not been for the fatal power of envy.

Indeed men too often take upon themselves in the prosecution of their revenge to set the example of doing away with those general laws to which all alike can look for salvation in adversity, instead of allowing them to subsist against the day of danger when their aid may be required.