Plateau

Muad'Dib tells us in "A Time of Reflection" that his first collisions with Arrakeen necessities were the true beginnings of his education. He learned then how to pole the sand for its weather, learned the language of the wind's needles stinging his skin, learned how the nose can buzz with sand-itch and how to gather his body's precious moisture around him to guard it and preserve it. As his eyes assumed the blue of the Ibad,
he learned the Chakobsa way.
-Stilgar's preface to "Muad'Dib, the Man"