Against Callimachus (27-28)

I beg you, however, to bear in mind that you have come to pass judgement on matters of the highest importance; for you are going to cast your votes on the question of a covenant, and covenants have never been violated to the advantage of either yourselves in relation to the other parties or of others in relation to you; and they have such binding force that almost all the daily activities of Greeks and of barbarians are governed by covenants.

For it is through our reliance on them that we visit one another’s lands and procure those things of which we both have need; with the aid of these we make our contracts with each other and put an end to both our private animosities and our common wars. This is the only universal institution which all we of the human race constantly employ. It is, therefore, the duty of all men to uphold them, and, above all, yours.