History of the Peloponnesian War

The Hellenes in Sicily would fear us most if we never went there at all, and next to this, if after displaying our power we went away again as soon as possible. We all know that that which is farthest off and the reputation of which can least be tested, is the object of admiration; at the least reverse they would at once begin to look down upon us, and would join our enemies here against us.

You have yourselves experienced this with regard to the Lacedaemonians and their allies, whom your unexpected success, as compared with what you feared at first, has made you suddenly despise, tempting you further to aspire to the conquest of Sicily.