As it is readily apparent at this time the mythology of Lost is influenced by Egyptian mythology. A part of Ancient Egyptian society was the multiple part concept of the soul. They believed that the soul was divide into several different parts that could exist separately of each other after death. Some of these parts were the Ka, or lifeforce; the Ba, or personality; the Akh which is the resulting spirit after the Ka and Ba are joined after death; and the Khaibit, or shadow. I’ve been trying to apply these concepts to Lost and ended up with many avenues to pursue. While trying to unify my thoughts on how this applied to Lost I realized that unification may be what the Island is trying to achieve.
Jacob and his Adverary represent two different aspects of the Island. It would appear that Jacob has an affinity for the material aspects with his interactions with the Losties and the way he influences the Others. The Adversary seems to be more aligned with spiritual or supernatural aspects. This would include the visual manifestations, whispers, and possesion of a dead person’s image. These two people seem to have been debating over the years as to which is more important. However I believe that the Island consideres both their views valid and wants them joined as one.
Now ever since the middle of season 1 our Losties have been separated in some way.
Season 1: Some Losties remain on the beach while another set goes to live in the caves.
Season 2: Some Losties remain on the beach while another group inhabits the Swan.
Season 3: One group is on the beach while another group is held captive by the Others.
Season 4: One group remains at the beach to await rescue by the Freighter Folk while another group goes and hides in Dharmaville.
Season 5: One group is living off Island while the other group is hop-skotching through time and ending up in 1974.
Again what I think the Island may be working towards is bringing all the different groups together to work for the common good of the Island.