History of the Peloponnesian War

"And yet, if we are prudent, we ought, each of us in behalf of his own state, to call in allies and incur dangers only when we are seeking to win what does not belong to us and not when we imperil what is already ours; and we should remember that faction is the chief cause of ruin to states and indeed to Sicily, seeing that we her inhabitants, although we are all being plotted against, are disunited, each city by itself.

Recognizing these facts, we must be reconciled with each other, citizen with citizen and state with state, and join in a common effort to save all Sicily. And let no one imagine that only the Dorians among us are enemies of the Athenians, while the Chalcidians, because of their kinship with the lonians, are safe.