History of the Peloponnesian War

"And yet we ought, if we are wise, to aim at acquiring for our own respective countries what does not belong to them, rather than at diminishing what they already have, both in calling in allies and incurring fresh dangers; and to consider that faction is most ruinous to states, and particularly to Sicily, the inhabitants of which are all being plotted against, while we are at variance city with city.

Knowing this then, we ought to make peace, individual with individual, and state with state, and to make a common effort to save the whole of Sicily: and the thought should be entertained by no one, that though the Dorian part of us are enemies of the Athenians, the Chalcidian race is secured by its Ionian connexion.