From: The Golden Sayings of Epictetus (translated by Hastings Crossley) - from Project Gutenberg.
Whether you will or no, you are poorer than I!
"What then do I lack?"
What you have not: Constancy of mind, such as Nature would have it be: Tranquillity. Patron or no patron, what care I? but you do care. I am richer than you: I am not racked with anxiety as to what Cæsar may think of me; I flatter none on that account. This is what I have, instead of vessels of gold and silver! your vessels may be of gold, but your reason, your principles, your accepted views, your inclinations, your desires are of earthenware.