Mythology of Lost: Structures [4/4] Ruins pt 5: The Heart of the Island
The Heart of the Island is a site on the Island containing water, a brilliant bright light, and high levels of electromagnetism. The Light, energy, and water radiate to other parts of the Island, albeit in much smaller quantities. Mother considered the site the source of life, death, and rebirth. The DHARMA Initiative thought it contained negatively charged exotic matter. Both believed in its power and believed it could, if improperly handled, destroy the world. The Heart is located just beyond the bamboo grove, and though its pockets cover the Island, only the current island protector can locate it directly. (x)
The heart of the island was the big revelation — the light at the end of the tunnel, if you will — and I thought it was a great one because, as the source of the electromagnetism on the island, it tied into so many aspects of the show. It was the reason the island was so unique which is what brought the Dharma Initiative there. It’s what caused the time travel and it meant the island could be moved, keeping it (and the people on it) hidden from the world.
It was also the culmination of the candidate storyline — why did Jacob need to find a new leader so badly? Because the heart of the island needs to be protected because it could be used to destroy the world, which explains why the Losties and pretty much every major character on the show were brought to the island.
A lot of people weren’t satisfied because it wasn’t explained what the heart of the island was exactly but that seems like a vicious cycle to me, once they had explained what it was they would only have to explain more and they quite rightly decided to focus more on the characters.