History of the Peloponnesian War

Which dominion we obtained not by violence, but because the confederates, when yourselves would not stay out the relics of the war against the barbarian, came in and entreated us to take the command of their own accord.

So that at first we were forced to advance our dominion to what it is out of the nature of the thing itself, as chiefly for fear, next for honour, and lastly for profit.