12.

Taekwondo is the way of mind. This is true because Taekwondo is fighting technique and fight is the matter of mind, not in its ideal but in its reality. This is reason why the good fighters have been called not as "strong man" but as "brave man" from the old time.
When I was a weak child, trembling with fear I couldn't understand this truth. But after training of Taekwondo, which gave me self-confidence, I got some wisdom and saw this truth. Taekwondo is the way of mind.
Therefore it is not a true Taekwondo training to move only physical body without mental training. It makes you unable to subjugate your opponent when you have to, after all. The key point of Taekwondo training is also the mental training in hard physical training