Since Horus was said to be the sky, he was considered to also contain the sun and moon. It became said that the sun was his right eye and the moon his left, and that they traversed the sky when he, a falcon, flew across it. Thus he became known as Harmerty - Horus of two eyes. Later, the reason that the moon was not as bright as the sun was explained by a tale, known as the contestings of Horus and Set, originating as a metaphor for the conquest of Upper Egypt by Lower Egypt in about 3000 BC. In this tale, it was said that Set, the patron of Upper Egypt, and Horus, the patron of Lower Egypt, had battled for Egypt brutally, with neither side victorious, until eventually the gods sided with Horus.
As Horus was the ultimate victor he became known as Harsiesis, Heru-ur or Har-Wer (ḥr.w wr 'Horus the Great'), but more usually translated as Horus the Elder. In the struggle Set had lost a testicle, explaining why the desert, which Set represented, is infertile. Horus' left eye had also been gouged out, which explained why the moon, which it represented, was so weak compared to the sun.-Wikipedia
My theory is that the island is the battlefiled for Set vs Horus.Claire's dream where Locke has a black stone and white stone in his eye sockets was a signal that this battle was taking place on the Island.I think Jacob is the re-incarnation of Sobek, the protector and healer, the fixer of wrongdoing and his Nemesis(mr x Or Esau as some people name him) is the re-incarnation of Apep, the god of evil.I think that many of the gods have been re-incarnated in the Losties, which is why they have special gifts.
The weather changes, tides, scattered light etc are explainable by the fact that the moon gods are fighting the sun gods.The Hurley bird is a re-incarnation of a god, which is why it knew Hurley's name-the bird may be a giant falcon, symbol of Horus.I think Vincent is a reincarnation of the dog in Jacob's cabin.
I must emphasize that Darlton have been throwing out ambiguous storylines since the beginning and as Twin Peaks is one of Lindelof's greatest influences on Lost, i have seen so many parrallels.Therefore, I think that all the manifestations and odd faux pas we've seen are meant to confuse the heck out of us and make us guess who is a reincarnated being and who is possessed, as opposed to who/what is a manifestation of Smokie.And also who is a ghost?
I think that whenever Richard looks for a leader he conducts the same test he conducted with Locke.The only reason he thought Locke was special was because Locke TT'ed to him and told him he was meant to be leader.the only reason Locke thought he weas special was because Richard and Ben told him so.Ben thought Locke was special because he healed.However we see in the finale that Locke was healed by Jacob.The question: why did Jacob heal him? The same reason he touched the other Losties-he knew they had a destiny to fulfill and they'd need help to get there.
In the beginning Apep(i'll call him that for now) said that Jacob brought the people to the Island.Obviously this has been happening for centuries, history keeps repeating itself.People come to the island, battle, die and get taken over by reincarnate gods.This is why the Others always require dead bodies to be buried-this reflects the Egyptian attitude to death-they must always be buried in case an evil spirit takes the body over.I think Jacob has ordered them to watch his back-he is expecting Apep to try and find a loophole.Which of course he does.The same loophole Ben wishes he knew to kill Widmore.An Other cannot kill an Other.However, Apep finds out that Ben was not a real Others leader.He works out that Ben was kept away from Jacob because he's a fake Other.Richard conjured up a lie to Widmore.
So what is the loophole? Locke actually died when he fell several stories.But Jacob healed him.In the time that Locke died, Apep took possesion of his body.This is why he never tells the Losties that he was paralysed before the crash.He only tells Walt, who he knows is a reincarnation also, therefore he can handle it.So how did Apep TT to the time when Locke fell? He didn't.Locke originally died.Jacob is the one who TT'ed to create the miracle.The Locke he healed is the Locke who eventually Ben kills and takes to the Island.Time course-corrected as Locke was always meant to die!Apep must have been hiding somewhere on the plane in his Locke body.
I know some of this is vague but I'm going out on a limb and saying that I am close to the truth.i'm still gathering more evidence for all this...
Love to hear all your theories on this