Epictetus

Epictetus' main work is the Enchirideon --or "Handbook", while his longer works are known as The Discourses. Like the other latin Stoics of his time, Epictetus focused on virtue and on being masters of our own lives.

Epictetus would love the Wikipedia:

"What is the first business of one who studies philosophy? To part with self-conceit. For it is impossible for any one to begin to learn what he thinks that he already knows." -- Epictetus

See also: Stoicism

External links: Epictetus's writings can be found at the Internet Classics Archive: http://classics.mit.edu/Browse/browse-Epictetus