History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

for he knows that many men ere now, whether pursuing with vengeance those who have wronged them, or in other cases, hoping to gain some advantage by the exercise of power, have, on the one hand, not only not avenged themselves but have not even come out whole, and, on the other hand, instead of gaining more, have sacrificed what was their own.

For revenge has no right to expect success just because a wrong has been done; nor is strength sure just because it is confident. But as regards the future, it is uncertainty that for the most part prevails,[*](ie. “most of our plans are baffled by the uncertainty of the future.”) and this uncertainty, utterly treacherous as it is, proves nevertheless to be also most salutary; for since both sides alike fear it, we proceed with a greater caution in attacking one another.

"So let us now, taking alarm on account of both these things—the vague fear of this hidden future and the immediate fear of the dread Athenian presence—and charging to these obstacles, as effectually blocking our way, any failure in the plans which any one of us had hoped to realize, let us dismiss from the country the enemy who is at our gates, and if possible let us make peace among ourselves for evermore; but if that may not be, let us conclude a truce for the longest practicable period, and put off our private differences to some other day.