History of the Peloponnesian War

Thucydides

Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.

knowing that this is that very crisis, in which he that helps is most a friend, and he that opposes, a foe.

And for these Corcyraeans, neither receive them as allies in spite of us, nor help them in doing wrong.

By thus acting, you will both do what becomes you, and advise the best for yourselves.
To this effect then did the Corinthians also speak.