Mark, I had a lot of doubts about chi until I started doing (and then teaching) tai chi in the water, which is usually called ai chi. There is one move I do where I feel the water moving particularly powerfully against and around me, as a result of hand movements to gather up and then share/disperse/dispense/bestow the abundance of energy. I can easily extrapolate from that sensation to consider the reality of energy waves. Water moves in patterned waves; air moves in measurable currents; why not spiritual energy?

~Susan