In the second time with the pig's head, it quotes, "He knew one of his times was coming on". There are many little hints like this throughout the book.
The character who speaks to the Lord of the Flies is Simon. He has a hallucinatory encounter with the severed pig's head, which is referred to as the Lord of the Flies, and it symbolizes the evil and darkness within humanity.
Simon seems to suffer from the physical weakness of being an epileptic. He suffers mentally from a deep fear of speaking in public.
How is Simon from lord of the flies?
He climbs the mountain after an epileptic seizure to seek the truth. He does finds out that the 'beast' is actually just a dead parachutist.
Simon appears to be an epileptic and perhaps as a result of avoiding people, so that they don't witness him having an epileptic fugue. Simon has become rather solitary and secretive. So, it is hardly unexpected that when confronted with the prospect of speaking publicly to a rather hostile audience he becomes incoherent and inarticulate.
Simon is known to 'faint' often, he goes to a secret place in the jungle to be alone. He feels a 'pulse beating in his head' and collapses after an imaginary conversation with the evil inside himself and a subsequent nosebleed. Simon is probably an epileptic.
Simon is a symbol of a prophet.
The Lord Of the Flies itself to Simon
Simon converses with the pig's head, which is known as the Lord of the Flies. The conversation reveals Simon's realization that the true nature of the beast is the evil that resides within each individual.
Simon represents Jesus Christ
Simon is an epileptic and during an epileptic fugue he has an internalised conversation with the evil which he knows dwells within us all. He mentally projects this inner beast onto the pig's head on a stick which Jack has left as an offering for the imagined beast.
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