Air (Vayu) is the idea of motion. Whatever moves in nature is propelled by air. The wind is the physical representation of air. Its mobile quality is self-evident. Moreover, air is the force behind all motion. It is the force that moves a butterfly, a hummingbird, an airplane and a person’s arm. Air can even move the earth in the form of an earthquake or mudslide. Air is not only the oxygenated air we breathe but also the force behind all movement. In the body, air represents the movement of nerve impulses, the movement of the breath and the limbs. In the mind, air is the force that moves thought.