Courtesy
It can be said that courtesy is an unwritten regulation prescribed as a means to enlighten man while maintaining a harmonious society.

Integrity
In Tae Kwon Do, one must be able to determine right from wrong and to have a conscience, if wrong, to feel guilt.

Perseverance
There is an old Oriental saying, "Patience leads to virtue or merit.  One can make a peaceful home by being patient for 100 times."  To achieve anything, whether it is a higher belt degree or perfection of a technique, one must set a goal, then constantly persevere to attain it.  One of the most important secrets to becoming proficient at Tae Kwon Do is to overcome every difficulty, in other words, to persevere.

Self-Control
This tenets is extremely important both inside and outside the do-jahng, whether it be while free-sparring in class or in every day life.  A loss of self-control in free-sparring can be disastrous to both yourself and your opponent.  An inability to live within one's capability is a lack of self-control.
Self-Control means never having to say you're sorry.

Indomitable Spirit
"Here lies 300, who did their duty."  It is a simple epitaph for one of the greatest acts of courage known to mankind. Although facing the superior forces of Xerxes, Leonidas and his 300 Spartans at Thermopylae showed the world the meaning of indomitable spirit. If confronted with injustice a student of Tae Kwon Do will deal with the injustice without fear or hesitation, with indomitable spirit, regardless whosoever or however many the number may be. As history has proven, those who have pursued their dreams earnestly and strenuously with indomitable spirit have never failed to achieve their goals.
Indomitable spirit means you have faith in yourself.

► Rules of the Do-jahng

► Five Tenets

► Ethical Rules

► Student Oath