Bompu, or "ordinary," Zen as opposed to the other four, each of which can be thought of as a special kind of Zen suitable for the particular aims of different individuals. Bompu Zen, being free from any philosophic or religious content, is for anybody and everybody. It is a Zen practiced purely in the belief that it can improve both physical and mental health. Since it can almost certainly have no ill effects, anyone can undertake it, whatever religious beliefs he happens to hold or if he holds none at all. Bompu Zen is bound to eliminate sickness of a psychosomatic nature and to improve the health generally.
Through the practice of bompu Zen you learn to concentrate and control your mind. It never occurs to most people to try to control their minds, and unfortunately this basic training is left out of contemporary education, not being part of what is called the acquisition of knowledge. Yet without it what we learn is difficult to retain because we learn it improperly, wasting much energy in the process. Indeed, we are virtually crippled unless we know how to restrain our thoughts and concentrate our minds. Furthermore, by practicing this very excellent mode of mind training you will find yourself increasingly able to resist temptations to which you had previously succumbed, and to sever attachments which had long held you in bondage. An enrichment in personality and a strengthening of character inevitably follow since the three basic elements of mind - that is, intellect, feeling, and will - develop harmoniously. The quietist sitting practiced in Confucianism seems to have stressed mainly these effects of mind concentration. However, the fact remains that bompu Zen, although far more beneficial for the cultivation of the mind than the reading of countless books on ethics and philosophy, is unable to resolve the fundamental problem of man and his relation to the universe. Why? Because it cannot pierce the ordinary man's basic delusion of himself as distinctly other than the universe.