When you fight against your opponent, you should increase your tide and oppress his, not only with the direct attacks and defences but also explosive ki-hap. The importance of ki-hap sound can be easily ignored, but it also has the right <Do>, so the ki-hap sound of Taekwondo should not be merely the vibration of the vocal chords yet should explode your spirit outside to express your tide so that the sound can ring the sky with the earth and infiltrate deep into the opponent's mind to shake and scatter the root of his spirit.

A ki-hap sound should not be alone separated from the motion of Taekwondo man yet ought to be an element harmonized in the motion with simpleness. This is why the sound also should not merely be a sound from the vibration of your vocal chords but ought to be an explosion of accumulated spirit from the vibration of your whole, like everything else of Taekwondo. Therefore, there cannot be a good ki-hap sound without a good spirit. And the spirit cannot be without confidence that you can win your opponent and your enough trainings for that. A roar of a tiger can oppress down a howl of a wolf because the life of the tiger, which feeds on a big animals, differs from that of the wolf, which feeds on only small ones.

The ki-hap is simple yet also various, so it is somewhat difficult to understand its invisible functions distinctively, however we can categorize the sounds into three kinds on one hand; the first that precedes a motion, the second that goes with a motion, and the third that follows a motion. And there are also a sound from the vibration of stomach, another sound from the vibration of throat, and the third from of the whole body, on the other hand. In addition to them, we can also follow another way to discern the sound that is cut and the other that lasts. In these manners, even a ki-hap sound is not separated distinctively for itself yet interrelated with the whole Taekwondo in a change.

As stated above, the change of ki-hap sound is complex and changeful with no substance, but it is simple to Taekwondo man. The ki-hap sound which follows TAEKWONDO is simply a sound which is made proper for Taekwondo man to control over his opponent, i.e. one which pops naturally from the inside of Taekwondo motion, exploding with no conscious control. Thus, the Taekwondo of the enlightened man can capably suppress down the opponent even only with a ki-hap sound before attacks and defences, and this includes every change in its naturality.

Your will is changing the world. A subject is not separated from an object in its essence. Sometimes a possibility of the object can fill up a defect of the subject, which consititute the whole. The ki-hap sound is neither the whole nor a part of Taekwondo.