As a consequence, wet things tend to be volatile and expansive, because they can fill spaces in their surroundings. Dry things are fixed and structured, because they define their own form. When an Element is out of its natural place, it has an innate tendency to return to its level. Thus bodies sink in water; air bubbles up; rain falls; and flames rise.
Earth is predominantly Dry, Water predominantly Cool, Air predominantly Moist, and Fire predominantly Warm. The dominant Power is the one in a counterclockwise direction from the Element in the Square of Opposition; thus the arrow by each Element points to its dominant Power. The vertical axis represents the active Qualities (Warm, Cool), the horizontal represents the passive (Moist, Dry).
The upper Elements (Air, Fire) are active, light and ascending, the lower (Water, Earth) are passive, heavy and descending. The Elements on the right are pure, extreme and absolutely light (Fire) or heavy (Earth); those on the left are mixed, intermediate and relatively light (Air) or heavy (Water).