Taekwondo students typically learn the following tenets as they progress through the belt ranks. They apply not only to athletes but also to everyone who aspires to a balanced life because physical health corresponds to emotional and spiritual health. However, I am not saying that physical training leads to spiritual fulfillment (something that some practitioners would have you believe). As Christians our spiritual walk should always center on the person of Christ as revealed in Scripture.
The martial arts teach that students should be courteous not only to their teachers but also to each other. The Bible instructs us to be courteous and respectful to all those with whom we come in contact
(1 Pet. 2:17).
A humble attitude is necessary for martial arts students so that they can be receptive to instruction. Likewise, Christians are to demonstrate humility before God and others (Phil. 2:3).
Integrity is needed for those who would someday become teachers and mentors—not only of the martial arts but also of the things of Christ (Titus 2:7–8).
Perseverance, of course, is required in any physical endeavor, but it is also vital for the emotional and spiritual trials each of us will face (Rom. 5: 3–4).
The martial artist is not unlike the warrior who dons his armor. Self-control is a hallmark of the warrior, in both the physical and spiritual sense, who must learn to control his techniques as well as his temper
(1 Thess. 5: 8).
Indomitable Spirit
While an indomitable spirit is a lot like perseverance, I explain to my students that perseverance is “sticking with something,” whereas indomitable spirit is “overcoming obstacles.”  As believers we are truly endowed with the indomitable Holy Spirit (Rom. 8: 37–39).