Discourses, "On the Power of Speaking" (§5)

“Man, your purpose (business) was to make yourself capable of using conformably to nature the appearances presented to you, in your desires not to be frustrated, in your aversion from things not to fall into that which you would avoid, never to have no luck (as one may say), nor ever to have bad luck, to be free, not hindered, not compelled, conforming yourself to the administration of Zeus, obeying it, well satisfied with this, blaming no one, charging no one with fault, able from your whole soul to utter these verses:”