Fear is prevalent in Lord of the Flies in several places. First the boys are afraid of the night because they cannot see. Next the boys are again afraid of what they are not even sure exists - the beast. What they really have cause to fear is what lies inside of them, in the heart of darkness that manifests itself when civilization and the rules of society are lost.
Lord of the Flies Quotes about Fear
"There had grown up tacitly among the biguns the opinion that Piggy was an outsider, not only by accent, which did not matter, but by fat, and ass-mar, and specs, and a certain disinclination for manual labour." (page 68).
Jack says "'We've got to talk about this fear and decide there's nothing in it. I'm frightened myself, sometimes; only that's nonsense! Like bogies." (page 89).
Jack says "'The thing is-fear can't hurt you any more than a dream. There aren't any beasts to be afraid of on this island.'" (page 90).
"No. You have doctors for everything, even the inside of your mind. You don't really mean that we got to be frightened all the time of nothing? Life,' said Piggy expansively, 'is scientific, that's what it is. In a year or two when the war's over they'll be travelling to Mars and back. I know there isn't no beast-not with claws and all that, I mean - but I know there isn't no fear, either.' Piggy paused. 'Unless-' Ralph moved restlessly. 'Unless what?' 'Unless we get frightened of people.' " (page 90).
"Sam looked at Eric irritably. The intensity of Eric's gaze made the direction in which he looked terrible, for Sam had his back to it. He scrambled round the fire, squatted by Eric and looked to see. They became motionless, gripped in each other's arms, four unwinking eyes aimed and two mouths open. " (page 106).
"They were savages it was true; but they were human, and the ambushing fears of the deep night were coming on. " (page 206).