In coastal and inland sand deposits, or dune systems, sand moves constantly — carried, lifted, and redeposited by air currents. At a certain point called an ecotone (transition zone), grasses take root first. Their roots stabilize and enrich the surface. Shrubs follow. Over time, the forest grows where the ground can hold. Philosophical parallel: Roots before branching. Humility is appreciating those who have gone before, and not assuming we automatically know more; it is a zealousness for knowledge.