"Moira?" he said. "The finished shape of our fate, the line drawn round it. It is the task the gods allot us, and the share of glory they allow; the limits we must not pass; and our appointed end. Moira is all these."
King Pittheus explains to the young Theseus the concept of moira. Theseus searches for the place of his moira, the area where he is destined to live out his days. He finds it in Athens, but it becomes clear that there is more for him to do then he ever would have dreamed. Life and death are moira, a notion that allows Theseus to maintain perspective. He does not fear for his life, because he knows that as long as he lives it well, whenever he dies it will be according to his moira, just as all that he will have done will have also been his moira. It is an all-encompassing notion that describes both existence and our role in it.