Gem

“Ghanima sensed her brother trembling where he sat in front of her. “What have you done?” she demanded. But he would not leave his own train of revelation. “Fewer sandtrout—the ecological transformation of the planet . . .” “They resist it, of course,” she said, and now she began to understand the fear in his voice, drawn into this thing against her will. “When the sandtrout go, so do all the worms,” he said. “The tribes must be warned.” “No more spice,” she said. Words merely touched high points of the system danger which they both saw hanging over human intrusion into Dune’s ancient relationships. “It’s the thing Alia knows,” he said. “It’s why she gloats.” “How can you be sure of that?” “I’m sure.” Now she knew for certain what disturbed him, and she felt the knowledge chill her. “The tribes won’t believe us if she denies it,” he said. His statement went to the primary problem of their existence: What Fremen expected wisdom from a nine-year-old? Alia, growing farther and farther from her own inner sharing each day, played upon this.”
― Frank Herbert, Children of Dune