1–3
"Possibly it will seem to you that what I and certain others say about the reality of the expedition against us is incredible, and I am aware that those who either make or repeat statements that seem not credible not only do not carry conviction but are also regarded as foolish; but nevertheless I will not be frightened into holding my tongue when the state is in danger, persuaded as I am that I speak with more certain knowledge than my opponents.
For it is indeed against you, much as you wonder at it, that the Athenians have set out with a large armament for use on land as well as on the sea, on the pretext of an alliance with the Egestaeans and the restoration of the Leontines, but in truth with a covetous desire for Sicily, and above all for our city, thinking that once in possession of it they would easily get possession of the rest also.
With the certainty, then, that they will soon be here, consider in what way with your present resources you can best ward them off, and may neither by despising them be caught off your guard nor through incredulity neglect the whole matter.