Themistocles
Plutarch
Plutarch. Plutarch's Lives, Vol. II. Perrin, Bernadotte, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1914.
and said to those who put wondering questions to him concerning his change of life that the trophy of Miltiades would not suffer him to sleep. Now the rest of his countrymen thought that the defeat of the Barbarians at Marathon was the end of the war; but Themistocles thought it to be only the beginning of greater contests, and for these he anointed himself, as it were, to be the champion of all Hellas, and put his city into training, because, while it was yet afar off, he expected the evil that was to come.