As the element of freedom, Airbenders can move about and dodge attacks without needing to worry about gravity or other environmental factors that limit the other forms of bending.
Airbending requires evading attacks with speed and agility to exhaust your opponent, or using massive amounts of inertia for explosive gusts of wind. Satan tries the same thing, he either waits until you are tired and unable to defend against his attacks, or he uses overwhelming force day after day until you give in.
Airbending's opposite is Earthbending. Learning to by completely flexible, and solid as a rock at the same time, is something that almost everyone struggles with. We must be Firm and Unshaken in our testimony of Christ, while still being led through an unpredictable life by the Holy Ghost.