History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
But most zealous in urging the expedition was Alcibiades son of Cleinias, wishing as he did to oppose Nicias, because, along with their general political disagreement, Nicias had made invidious reference to him,[*](cf. 6.12.2.) and above all he was eager to be made general and hoped thereby to subdue both Sicily and Carthage, and in case of success to promote at the same time his private interests in wealth as well as in glory.
For being held in high esteem by his townsmen, he indulged desires beyond his actual means, in keeping horses as well as in his other expenses. And it was precisely this sort of thing that most of all later destroyed the Athenian state.