When Simon first sees the Lord of the Flies, he feels a pulse in his right temple, a specific symptom of temporal lobe epilepsy. In ancient times, people with epilepsy were thought to have been sent from the gods, been blessed with the power of prophecy, or have some other divine link. This adds to Simon's place as a Christ-like or divine figure within the novel.
Second, both Simon and Piggy are wise and mature beyond their years. Piggy represents the rational world. He acts as Ralph's advisor, as the others will not listen to his intellect if it comes from him. Being the brainy representative of civilized society, Piggy believes that "lifeis scientific." After the trauma of Simon's death at the boys' hands, Piggy is "searching for a formula" to explain the death. Piggy is the voice of reason throughout the novel, asserting that "we just got to go on", although he realises Jack has won. Piggy also understands that the Beast is not what they all think it is, although he doesn't quite understand that the Beast is within them. Perhaps this is because his way of thinking is too scientific to fully understand a metaphor like that. .
Simon is probably very good at understanding metaphors, considering his whole life is one. Simon takes life much more seriously than the other boys (perhaps due to living with a disability?) and is plagued with a moral consciousness that the other boys lack. He has a heightened perception of the world around him. He is the only boy to realise that the Beast is not something that can be killed, but rather something that is inside each of the boys. In the midst of an argument about the Beast he even interjects "Maybe it's only us." He means that it might just be them on the island, but he certainly seems like he's talking about the Beast being inside them. A lot of what Simon says is prophetic and wise, for example when he says to Ralph "You'll get back all right," partially implying that he himself will not.
