I practiced Joong-gi danbup for a full year. I did not start Gun-gon danbup until the next year in the spring of 1950. Gun-gon danbup is the next higher level and when I began it I realized that Joong-gi danbup had only laid the groundwork. Therefore without the basic groundwork of Joong-gi danbup I would not have been able to practice the mysterious Gun-gon danbup correctly. It is difficult to understand this just by listening to an explanation and would definitely have no effect at all. But when experienced and gained by the body, its principle operates on my body and mind. In that operation, one will automatically get to realize by himself.

Gun-gon danbup has only 23 postures. But it still took me a full year to practice this Gun-gon danbup. My Daoist master, Chung-woon, would always explain something with few simple words and then make me practice so I could realize the danbup automatically. By realizing and experiencing its principle I was able to grasp its truthfulness. When I experienced the truth of the principle then I had faith in it. This faith has become so strong that it is like a mountain which wouldn't change even if the whole world moved.

If one cannot treat the accumulation of Won-gi (source energy) correctly then he/she could get into a difficult and troubled situation. Practitioners could be seriously damaged if they do not learn how to cope with it correctly through guidance from an instructor.

Think about it. I went into the mountains and had a year of hardship. Then I had a year of practicing 50 danbup of basic haeng-gong which was followed by another year of practicing Gun-gon danbup. You can guess how hard it is to practice Dao.

Now, talking about it, my attempt to make people in cities attain Dao by practicing only one or two hours a day actually seems not possible. But my master gave me directions to open practice centers because he said it is not absolutely impossible for people in cities to attain Dao. I did it. And by discovering the possibility that this job could be accomplished, I gained faith.
However, the phenomena that happen from Gun-gon danbup haeng-gong are hardly understandable through common sense. Danbup principles are composed of the essentials of eastern philosophy. One cannot understand them without accepting eastern philosophy. And one cannot get through the mysterious experience without practicing it.
It is like a western doctor researching eastern medicine. It is like the fact that he/she could not use acupuncture, moxibustion or medicine without accepting the energy principles of one energy, 12 meridian lines and 365 meridian points of eastern philosophy. Western doctors cannot see the results until they accept the principles and apply them.
During the late 20th century western doctors suddenly expressed great interest in eastern medicine. This shows that they are hurrying toward the recognition of the principles of energy, yin-yang, and the five elements of eastern philosophy. But western doctors, with their psychology and physiology, are only in the first step of proving the rationality of eastern philosophy based on dan principles. The theory seems abstract. But when one puts it into practice, it is reasonably proven by the phenomena which occur in the body.
That is why my master Chung-woon always explained with a few simple words and then made me realize automatically through practicing the danbup. My realization and experience gave me faith in the principle because I knew its truthfulness. This faith has become so strong that it is like a mountain that wouldn't change even if the whole world moved.
The energy of Heaven-Earth-Man and Gun-Gon pervades the universe and operates the yin-yang /five elements. Man lives within the same principle.
The Gun-gon haeng-gong (breathing-motion(posture) practice) can be seen from a universal standpoint as a method of implementing the cosmological formation principle inside the human body.