“I came to realize that my way of thinking about power had been greatly in error, for power to me meant that of the body and of the arms. What I should have considered was the power of the body as a unit. We speak of body power and spiritual power. It was only when I pursued both that my stricking began to underego a change. The problem is that of complete harmony between body and soul […]
“To use fist effectively, two points are crucial: (1) relaxing and (2) concentration power. If the body is tense and rigid, the power in the elbows, shoulders, stomach, hips and legs cannot be released. Power cannot be dispersed throughout the body; it must be concentrated in the fist alone. I resolved to put this into practice. (The beginner will find it impossible to release power, for he has not learned to concentrate it, but concentration can be done quite naturally.)
Since he is unaccostumed to stricking, the begginer wil at first be confused. It is important not to put any power in the arm. Simply straighen your elbow naturally and take all power out of the arm and shoulder. Not only must concentration of the power be in the fist but the movement must not be impeded due to tenseness or rigidity.
The most important thing is how you feel. Practice as if your blow will pierce through your opponent or the stricking post.”
(Shigeru Egami, in Beyond Technique)