When I see this piece of martial koan, a smaller segment of the entire koan called the ken-po goku-i or gokui, I think of many things of which one is the principle of heaviness. Heaviness is the transition a novice makes through the learning of principles from muscling it to utilizing weight in motion to achieve effectiveness in martial practice and application.
We as martial artists work diligently to achieve application of motion of our body weight in a "sudden" application so we can manifest our weight faster than that of our adversary so they cannot compensate fast enough to claim any advantage over us in our efforts of defense. We maintain other principles such as posture to enhance the application of weight in motion.
We must exercise our anatomy to maximize our weight as it is applied to techniques, another principle. Therefore I conclude that as to my theory on the gokui, it is a tool to teach us our philosophical principles toward other more physiokinetic principles to apply teachings in defense. Principles are a matter of effectiveness of how we learn and apply the principles of theory (as I do in my writings as they apply to my practice), physiokinetics, techniques and philosophy.