History of the Peloponnesian War

Vengeance is not necessarily successful because wrong has been done, or strength sure because it is confident; but the incalculable element in the future exercises the widest influence, and is the most treacherous, and yet in fact the most useful of all things, as it frightens us all equally, and thus makes us consider before attacking each other.

Let us therefore now allow the undefined fear of this unknown future, and the immediate terror of the Athenians' presence to produce their natural impression, and let us consider any failure to carry out the programmes that we may each have sketched out for ourselves as sufficiently accounted for by these obstacles, and send away the intruder from the country; and if everlasting peace be impossible between us, let us at all events make a treaty for as long a term as possible, and put off our private differences to another day.

In fine, let us recognize that the adoption of my advice will leave us each citizens of a free state, and as such arbiters of our own destiny, able to return good or bad offices with equal effect; while its rejection will make us dependent on others, and thus not only impotent to repel an insult, but on the most favourable supposition, friends to our direst enemies, and at feud with our natural friends.