I cannot positively say that Simon does not believe in the existence of a beast on the island with the boys. What I can say is that Simon's belief in a "beast" is quite different from the beliefs of the other boys. Many of the boys believe that the beast on the island is a big beast with sharp teeth, claws, and so on. They believe it is something that can be hunted down and killed. Simon's beast is more abstract. He believes that the beast is inside each of the boys. The beast is man's ability and desire to act as a savage beast and do harm upon his fellow man. Simon correctly realizes that the boys are a greater risk to each other than any other possible beast that might exist on the island.
However Simon thought of the beast, there rose before his inward sight the picture of a human at once heroic and sick.
If readers need a proof of concept of Simon's theory about the beast, readers need look no further than Jack and Roger.
In chapter 5, Ralph brings up the existence of the beast at the...
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