Good posts TCB.
I find that the energy is there when it is needed and that it just happens. Often I have to be careful in shaking hands to not let it out (hurt someone once...totally unintentional) Often with my students, I think I am just lightly touching them in demonstrating a technique...but they are getting hurt...so I make sure to tense a little to stop the flow of internal power...but it is darn uncomfortable.
There is a balance to power...too tense and you do not develop it, too limp and you do not develop it. To develop it one has to be sung...not relaxed per say as some interpret this as limp. I prefer to translate it as loose.
GHD
...ask for Kam
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"Fool me once, then shame on you. Fool me twice, then shame on me"