The Republic by Plato Part 5 Page 75

and discord, they being by nature friends; and such enmity is to be called discord.

I agree.

Consider then, I said, when that which we have acknowledged to be discord occurs, and a city is divided, if both parties destroy the lands and burn the houses of one another, how wicked does the strife appear! No true lover of his country would bring himself to tear in pieces his own nurse and mother: There might be reason in the conqueror depriving the conquered of their harvest, but still they would have the idea of peace in their hearts and would not mean to go on fighting for ever.

Yes, he said, that is a better temper than the other.

And will not the city, which you are founding, be an Hellenic city?