A teacher, a really good sensei, is never a 'giver' of "truth"; he is a guide, a 'pointer' to the truth that the student must discover for himself.
TKDTutor Comments: So, does mean that instead of showing the student how to perform a perfect kick, the teacher should just let the student figure it out for himself and then just point out to the student what is wrong with the kick. This is a poor method of teaching.
A good teacher, therefore, studies each student individually and encourages the student to explore himself, both internally and externally, until, ultimately, the student is integrated with his being. For example, a skillful teacher might spur his student's growth by confronting him with certain frustrations. A good teacher is a catalyst. Besides possessing a deep understanding, he must also have a responsive mind with great flexibility and sensitivity.
TKDTutor Comments: True, this is why all good martial art teachers do this.