History of the Peloponnesian War

Therefore if a man should sum up and say that they were born neither to have peace themselves nor to let other men have it, he would simply speak the truth.

"And yet, although you have such a state ranged against you, O Lacedaemonians, you go on delaying and forget that a peaceful policy suffices long only for those who, while they employ their military strength only for just ends, yet by their spirit show plainly that they will not put up with it if they are treated with injustice; whereas you practise fair dealing on the principle of neither giving offence to others nor exposing yourselves to injury in self-defence.l But it would be difficult to carry out such a policy successfully if you had as neighbour a state just like yourselves;

whereas now, as we have just shown, your practices are old-fashioned as compared with theirs.

But in politics, as in the arts, the new must always prevail over the old. It is true that when a state is at peace the established practices are best left unmodified, but when men are compelled to enter into many undertakings there is need of much improvement in method. It is for this reason that the government of the Athenians, because they have undertaken many things, has undergone greater change than yours.