In chapter 7 while Ralph is standing on the rocks looking down at the vast ocean and the waves crashing against the reef, he is clutching a rock hard with both hands. Simon tells Ralph, "You'll get back to where you came from." "It's so big." Ralph replies. "All the same. You'll get back all right. I think so anyway."
In chapter 11 Piggy is determined to confront Jack and his hunters. Ralph really doesn't want to go. Sam says that if Jack "gets waxy, (angry) we've had it." It is at this point that Ralph "dimly remembrs something that Simon had said to him once."
By recalling that Simon had told him Ralph would get back to where he came from, Ralph pushes down his fear of what Jack might do and once again becomes the "leader" and tells Piggy that he would take him to Jack and confront him.