I friend sent me an article which was very interesting, but the formatting wouldn't easily allow me to cut and paste a portion below. Please follow the link.
If you are interested in the martial of of Ba Gua Zhang (aka PaKuaChang), a must read is the back issues of the out of print magazine dedicated to it, the Pa Kua Chang Journal, published by Dan Miller.
This particular article was an interview with C.S. Tang, an expert in the Gao Style of BaGua, and the unofficial historian of the style. The full article appears on Mr. Tang's website here.