History of the Peloponnesian War

"You have reason besides to maintain the dignity the city hath gotten for her dominion in which you all triumph, and either not decline the pains or not also pursue the honour. And you must not think the question is now of your liberty and servitude only. Besides the loss of your rule over others, you must stand the danger you have contracted by offence given in the administration of it.

Nor can you now give it over (if any fearing at this present that that may come to pass, encourage himself with the intention of not to meddle hereafter), for already your government is in the nature of a tyranny, which is both unjust for you to take up and unsafe to lay down.

And such men as these, if they could persuade others to it or lived in a free city by themselves, would quickly overthrow it. For the quiet life can never be preserved if it be not ranged with the active life, nor is it a life conducible to a city that reigneth but to a subject city that it may safely serve.