Well, I know very little about Chi at the most. Though from what I know, read and have expirenced, proper Chi/Ki/Qi balance/training is neccessary for Mind, Body and spirit to unify and work together as one to obtain optimal performance. Not just in Martial arts either, It applies to life in general.

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"-when you yourself know that a thing is good, that it is not blamable, that it is praised by the wise and when practiced and observed that it leads to happiness, then follow that thing.”