Nowadays, books about Tai Chi are many. Most of them focus on its tangible aspects like standards and requirements on postures and movements.
Most writers on Tai Chi have either maintained an embarrassing silence concerning energy of Qi, the intangible aspect of Kung Fu, or just put it in a marginal place and leave it un-elaborated.
However, the greatness of Tai Chi lies in its intangible aspect. “What is essential is invisible to the eye.”  This is the diamond on the top of the crown of Kung Fu. What a shame if we present the crown to the world and find that the diamond has gone.
Energy of Qi is not unique in Tai Chi Quan. Many Kung Fu varieties aim at it at their advanced level.
Terms and jargons in traditional Kung Fu theories are usually loan words from traditional religion or philosophy classics. The cultural content density creates high barrier for westerners to understand.
In the following articles, I try to summarize what I have learned from Mr. Tan Jing, my Kung Fu teacher. In these articles, I try to present a general introduction to intangible aspect of Kung Fu with least of those traditional Chinese terms and jargons.
Here I need a scaffolding framework that westerners are familiar with. I choose Bible.
However, the verses quoted in the articles may not be equivalent to their original message because they are used as analogy for scaffolding purpose. Therefore, Bible verses in this context are like bridges that facilitate western Tai Chi learners to cross from known to unknown.