it's a pity that the interesting suggestion he made that you connect to earth with koshi and heaven with hara is getting lost.
I agree it is interesting, which is why I am engaging in this thread!
I keep wishing that he could cite a reference other than his own experience. Is this a reflection of how ki moves up and down in the body during certain breathing meditations? Does anybody from Ki Society background know if this was ever explicitly discussed, taught or shown by Tohei Sensei?