Discourses, "Irrevocable is My Word and Shall Not Fail" (§1)

“Such will I show myself to you, faithful, modest, noble, free from perturbation. What, and immortal, too, except from old age, and from sickness? No, but dying as becomes a god, sickening as becomes a god. This power I possess; this I can do. But the rest I do not possess, nor can I do. I will show the nerves (strength) of a philosopher. What nerves are these? A desire never disappointed, an aversion which never falls on that which it would avoid, a proper pursuit, a diligent purpose, an assent which is not rash. These you shall see.”