History of the Peloponnesian War

"These, then, are the pleas of right which we have to urge to you, sufficiently strong according to the laws of the Greeks; and we have the following advice, and claim on you for favour, which, being not enemies so as to hurt you, nor, on the other hand, suck friends as to be very intimate with you, we say ought to be repaid to us at the present time.

For once, when you were in want of long ships for the war with the aeginetans, before that with the Medes, you received from the Corinthians twenty ships. And this service, and that with regard to the Samians, namely, that it was through us that the Peloponnesians did not assist them, gave you the mastery of the aeginetans, and the chastisement of the Samians: and it took place in those critical times in which men, when proceeding against their enemies, are most regardless of every thing besides victory. [*]( Or, in comparison with victory. )

For they esteem him a friend who assists them, even though he may before have been an enemy; and him a foe who opposes them, though he may have happened to be a friend; nay they even mismanage their own affairs for the sake of their animosity at the moment.