Here's a bit of a change of subject
I've often wondered why the masters of this stuff were all said to ab a bit wierd. Were they wierd before hand? Self absorbed, odd ducks? Or did the hours and hours of work, and failure, then these "masters in the making" the facing all the other budo-johnies so ill equiped to face THEM that gave them a bit of low opinion of others efforts? A little research shows the personaliteis of many of the known masters was a litany of strange behaviour.
I know my comment can offer some comical comebacks, but it is interesting when you read story after story.
IMHO, its not a change of subject at all. Besides the internal physical skills, there are certainly the internal attitude (for lack of a better word) skills that also direct energy (ki).