by killing people and giving them to the beast "sacrafice"
Jack's denial that they killed the beast reveal about him that beast still exists. His plan that they keep on the "right side of the beast" suggest that people frequent make offerings to satisfy the beast. I think Jack truly believe there's a beast because he had seen it on the mountain top. His continuing to promote the existence of the beast to the others give him advantage over them by making obey him if they want to be safe!
Jack doesn't kill the trapped piglet because he wants to continue hunting and believes that a live pig would provide more excitement and challenge. Additionally, Jack may not see the trapped piglet as a worthy target for his aggression.
Jack's answer to questions about the beast is to say that, "if there is a beast we will hunt it and kill it." Ralph keeps insisting, "but there is no beast!"
Jack warned his tribe about the presence of the beast on the island, which he believed to be a threat to their safety. He instilled fear in the group by suggesting that the beast could harm them and was responsible for mysterious occurrences on the island.
they went after the beast but jack decide to forget the beast and play rolling rock
Kill it.
Jack says they will leave the head of a sow for the beast as an offering in Chapter 8. He believes it will appease the beast and prevent it from attacking the boys.
Jack tries to downplay the fear of the beast by suggesting that it may not be real or that they can overcome it with resolve and strength. He focuses on instilling confidence in the boys and encouraging them to be bold and fearless to face whatever challenges they may encounter.
Jack needs the power of the beast in a couple of ways: as a common enemy for the boys to unite them; as a way to gain respect and to manipulate others as well as to satisfy his hunger for power; and as an excuse for hunting perhaps. Jack sort of became the spokesperson in the previous few chapters. He give offerings to it, tell others to leave it alone on 'the other side'. He is trying to make it more real for the others. Jack himself does not believe in the physical beast but is closer to the true beast- the capacity for evil in everyone, then everyone, even Simon. He is not afraid of it, as no one would use things they are uncertain or afraid of. if the beast is dead, he will loose power. Therefore even though he consciously recognize the murder of Simon though he hides it from the others. No one could stop him from using the beast now that Simon has died. He could make the beast immortal.
jack
he offers his tribe his protection from the beast om the jungle
Jack blows the conch for the assembly to talk about the beast and that Ralph thinks that Jack's hunters are cowards and can't face the beast.