Needless to say, the success or failure of Taekwon-Do training depends largely on how one observes and implements the Tenets of Taekwon-Do which should serve as a guide for all serious students of the art. 

COURTESY (Ye Ui) 
    Taekwon-Do students should attempt to practice the following elements of courtesy to build up their noble character and to conduct the training in an orderly manner as well. 

    1)    To promote the spirit of mutual concessions. 
    2)    To be ashamed of one's vices, comtempting those of others. 
    3)    To be polite to one another. 
    4)    To encourage the sense of justice and humanity. 
    5)    To distinguish instructor from student, senior from junior, and elder 
           from younger. 
    6)    To behave oneself according to the etiquette. 
    7)    To respect others' possessions. 
    8)    To handle matters with fairness and sincerity. 
    9)    To refrain from giving or accepting any gift when in doubt. 
 

INTEGRITY (Yom Chi)

    In Taekwon-Do, the word integrity assumes a looser definition than the one usually presented in Webster's Dictionary. One must be able to define right and wrong and have the conscience, if wrong, to feel guilt. Listed are some examples, where integrity is lacking: 

    1)The instructor who misrepresents himself and his art by presenting 
       improper techniques to his students because of a lack of knowledge or
       apathy. 
    2)The student who misrepresents himself by "fixing" breaking materials 
       before demonstrations. 
    3)The instructor who camouflages bad techniques with luxurious training 
       halls and false flattery to his students. 
    4)The student who requests rank from an instructor, or attempts to 
       purchase it. 
    5)The student who gains rank for ego purposes or the feeling of power. 
    6)The instructor who teaches and promotes his art for materialistic gains. 
    7)The student whose actions do not live up to his words. 
    8)The student who feels ashamed to seek opinions from his juniors. 
 

PERSEVERANCE (In Nae)

    There is an old Oriental saying, "Patience leads to virtue or merit." "One can make a peaceful home by being patient for 100 times." Certainly, happiness and prosperity are most likely brought to the patient person to achieve something, whether it is a higher degree or the perfection of a technique, one must set his goal, then constantly perserver. Robert Bruce learned his lesson of perseverance from the persistent efforts of a lowly spider. It was this perseverance of tenacity that finally enabled him to free Scotland in the fourteenth century. One of the most important secrets in becoming a leader of Taekwon-Do is to overcome every difficulty by perseverance. 
    Confucius said; "one who is impatient in trivial matters can seldom achieve success in matters of great importance." 
 

SELF-CONTROL (Guk Gi)

    This tenet is extremely important inside and outside the do-jang, whether conducting oneself in free sparring or in one's personal affairs. A loss of self control in free sparring can prove disastrous to both student and opponent. An inability to live and work within one's capability or sphere is also a lack of self-control. 
    According to Lao-Tzu "the term of stronger is the person who wins over oneself rather than some one else." 
 

INDOMITABLE SPRIT (Baekjul Boolgool)