History of the Peloponnesian War

Now you could scarcely have succeeded in such a policy even with a neighbor like yourselves; but in the present instance, as we have just shown, your habits are old-fashioned as compared with theirs.

It is the law as in art, so in politics, that improvements ever prevail; and though fixed usages may be best for undisturbed communities, constant necessities of action must be accompanied by the constant improvement of methods. Thus it happens that the vast experience of Athens has carried her further than you on the path of innovation.

Here, at least, let your procrastination end. For the present, assist your allies and Potidaea in particular, as you promised, by a speedy invasion of Attica, and do not sacrifice friends and kindred to their bitterest enemies, and drive the rest of us in despair to some other alliance.

Such a step would not be condemned either by the gods who received our oaths, or by the men who witnessed them. The breach of a treaty cannot be laid to the people whom desertion compels to seek new relations, but to the power that fails to assist its confederate.