Alcibiades (23.3-23.4)

At Sparta, he was held in high repute publicly, and privately was no less admired. The multitude was brought under his influence, and was actually bewitched, by his assumption of the Spartan mode of life. When they saw him with his hair untrimmed, taking cold baths, on terms of intimacy with their coarse bread, and supping black porridge, they could scarcely trust their eyes, and doubted whether such a man as he now was had ever had a cook in his own house, had even so much as looked upon a perfumer, or endured the touch of Milesian wool.

He had, as they say, one power which transcended all others, and proved an implement of his chase for men: that of assimilating and adapting himself to the pursuits and lives of others, thereby assuming more violent changes than the chameleon. That animal, however, as it is said, is utterly unable to assume one color, namely, white; but Alcibiades could associate with good and bad alike, and found naught that he could not imitate and practice.