<Do> exists with everything, and everything shows itself in its figure as a change of Yin&Yang, thus when we talk Yin&Yang as sort of abstraction we can also talk the hardness and softness as sort of its concret feature. Since early times each aspect of this hardness and softness has been named Kang-Yu(), which is the very useful concept for explanations about motions of Taekwondo, thus every motions of Taekwondo ought to have in its rightness both hardness and softness toghether in each of <Sool>, <Yae> and <Do>. Therefore the true Taekwondo teaches us to learn both together. Since the hardness and the softness help and fight each other in the change of Taekwondo the soft capably suppress down the hard while the hard capably cut out the soft. Also the soft capably keep the hard alive making it changeful while the hard capably deep the soft strong making its bones inside.

How is it possible that the hard can win the soft while the soft also win the hard when they fight each other? It is because the winning and losing begins with what a man wants to do and by way of the strength in his motion, then it returns to the will. You can see only motions and can feel only strength. The strength follows the will. The hard is based on the strength and the bones while the soft is based on the will and the vitality. When the wills of two man fight each other none of them can but rely on the strengths and the motions. The strengths and the motions under the will's control are unified and divided circularly so that it contains both firmness and weakness together and both hardness and softness together. Therefore, since the hard can win the soft it is easy to control over the opponent thrusting his weak and soft part with my firm and hard part. On the other hand, the soft can surpass the hard because the soft does not run against the hard but wrap it and lead it. Finally the subject who controls or who is under the control is the man who uses the hardness and the softness, yet is not the hardness or the softness itself. The ways the hard and the soft win each other are like the followings. Ths soft can warp and lead the hard only when each part of the soft cooperate with another part in the whole motion. Cutting off this whole the hard can suppress down the soft. On the other hand, the hard should adapt itself along what the will intends. Leading the direction the soft can keep the hard in conflict against the world.

No matter haow strong and hard a skill may be it cannot succeed in the attack at the opponent without softness in it, and no matter how soft a skill may be it should also have the hardness in itself in order that it catch and break the the opponent's will. Only with the strong and hard body and edge a knife can pierce a target when thrown, however, in case that a sheath which covers the knife were also strong and hard the knife would collide with its sheath, and it will get dull. On the other hand, in case that the knife were wrapped b colth when thrown its softness will not spoil the sharpness of the knife. If the sheath were also so strong and hard as its knife it would rather be useless, so it is made smooth, and the string of a bow which shoots arrows should be pliable.

It is only proper that the life is soft. Therefore, a motion of Taekwondo which intends to control over the opponent's life, should necessarily include both hardness and softness together. Because the strongness and hardness also come from your own life, which is soft, too. This can be compared to the bowl that contains hard stones; If we put hard stones in the bowl that is also hard they would collide and run against one another, and they will be week and broken inevitably. The hard stones should be put in soft cloth to avoid its damage. In the same manner you ought to have your body not strong and hard but rather soft and flexible, in order that you can have the strongness and the hardness in your motion of Taekwondo.

Just as a life stands with two legs of the hardness and the softness the two legs which support a personality are the Mun(Literateness ) and the Mu(Martiality ). Since the Mun(Literateness) is softe, a man learning literal knowledge fosters sucha personality as is reconciled with anothers without quarrels, and since the Mu(Martiality) is hard a man training martial arts grows such a personalityas is courageous with fortitude to fight against any injustice. The softness of a literal knowledge never get damaged even if you face the opponent who argues against you, but he rather helps you to learn more with knowledges and argumentations most cases. This can be compared to that the pieces of cottonwool never get damaged in their collisions. The hardness of martial arts capably helps you to break down what resists you, and to give rise to what you want to do. There can be no contradiction nor subjective distortion in it. Thus it capably breaks unnecessary ideas and comes in direct contact with reality.

If you only learn literal knowledge not training martial arts your personality, promoted with conceptual ideas, will be filled with doctrinarianisms and wild fancies, and you will be an effeminate highbrow. Also if you only train martial arts with little literal knowledge your force will get lost of its direction and may turn to a violence which will kill itself and you at once. Therefore the lack of any of both prevents you from completing good personality, thus you ought to train both Mun-Mu() to get the balance of the hardness and the softeness in your personality. A Taekwondo man's learning both the hardness and the softness is in the wide view closely related to his having the balanced Mun-Mu.

That a Taekwondo man should train his body rather soft and flexible than hard and hard is based on the same principle as that a Taekwondo man should have his opponent in conflict with the world and harmonize himself with the whole of both. The soft and flexible bod adapts itself to every kind of change while the strongness and hardness in it breaks down whatever resists it. This TAEKWONDO itself is neither the softness nor the hardness, but the unity that includes the both. It has not had any proper name, but it can be called "naturality" if it were given. It is almost impossible without naturality that the hardness turns soft and the softness contains the hardness so that various changes are harmonized in oneness. You should not forget that you want the strongness and the hardness from Taekwondo not to suppress down yourself but to control over your oppponent.