Encompassing linear, arching and circular offensive and defensive techniques, many of Hapkido's techniques were designed hundred of years ago to incapacitate an opponent on the battlefield through the most efficient and thorough manner possible using physics, geometry and physiology.
In the more modern civilian form of our days, the focus is to defend oneself without causing permanent physical damage to an assailant (if possible). Control is emphasized in Hapkido and is used according to the circumstances.
Techniques are done with small and large circular motions to fast complete conclusions making the concept of balance the cornerstone of Hapkido philosophy. Hapkido students learn to harmonize with an opponent's strength and force by making it your own using it against him.
The art in Hapkido involves learning how to control power through the use of meditation. In training, one must first learn to control and compose the body, second regulate the breath, and third, quiet the mind.