I need two quotes that are significant from chapter 9 of "Lord of the Flies" and can you please give me an explanation for them?

The main things that happen in chapter 9 are Simon's death and Jack's emergence as a leader. The first quote is the boy’s chant of "Kill the beast! Cut his throat! Spill his blood! Do him in!" The boys are yielding to their baser instinct of savagery and when Simon stumbles into the center of the horseshoe arrangement he conveniently becomes the beast and is murdered. We are told that he was on his knees with his arms folded over his face. The second quote is when Jack says "We shan't hear it" in reference to Ralph's blowing the conch. Jack is refusing to acknowledge the conch as a symbol of authority and is challenging Ralph to leadership of the clan of boys.