This force accumulated in the seika tanden fills every part of the body, like water flowing out that never stops. This force extends from a calm, serene and relaxed body and mind and can be used whenever necessary in any direction. This force is called kokyū ryoku.
Nobuyoshi Tamura Sensei
From the o/p....
Fills every part of the body, like water flowing that never stops. From seika tanden.
From a calm, serene, relaxed body and mind.
You can't find this through intellect. You can't find this through logic. It's not dependent on who said what and when.
Through spirit, yes. I personally call this Hara, for both location and resultant conditions and flow.