Moral life is freely determined. The Odyssey is a poem about moral freedom. By the end of the Odyssey we see that our moral existence is not only self determined, but that the choices are clear. They are clear because the moral principle guiding moral choice is clearly defined. This is a liberating discovery.
Moral freedom is impossible if the rules are arbitrary or ever-changing.
Moral freedom is impossible too in a universe populated and governed by a rag tag collection of warring gods playing different games with ill defined rules. The Odyssey is more than a grand adventure. Those existential Jobian question are there too. Life, as Homer discovers, is indeed a bitch. I also believe it's the right answer.