History of the Peloponnesian War

To such an extent, because of their present good fortune, did they expect to be thwarted in nothing, and believed that, no matter whether their forces were powerful or deficient, they could equally achieve what was easy and what was difficult. The cause of this was the amazing success which attended most of their undertakings and inspired them with strong confidence.

The same summer the people of the city of Megara, being harassed in the war by the Athenians, who regularly invaded their country in full force twice every year, and also by their own exiles in Pegae, who had been expelled in a revolution by the popular party and kept annoying them by raiding the country, began to say to one another that they ought to receive the fugitives back, so that the city should not be exposed to ruin from both directions at once.