In the plaza, as the fourth and fifth questions continued, the furrow between Chen Feiyu's brows gradually relaxed.
"A matter hard to know—heh, what a brilliant 'matter hard to know.' Not only is the answer hard to know, even the exact meaning of the question is hard to fathom. Perhaps this 'matter hard to know' has no fixed answer at all. If that's the case, I will simply write down what truly represents a 'matter hard to know' within the principles of traditional Chinese medicine. And the aspect of TCM that is hardest to comprehend and grasp must be the Five Phases and Six Qi along with the Yin-Yang and Eight Trigrams. Perhaps this is the true 'matter hard to know.'"
A flash of inspiration struck Chen Feiyu's mind. He picked up his brush and wrote: *"Re-entering Tai, Zhuang, Guai, Qian, Gou, Dun, Pi, Guan, Bo, Kun, two and six. Cyan and white clearly divide, opening and closing. Red and black come and go, clearing the pathways... Blood and qi are contained within the six sons, flowing day and night through fifty cycles... To know it is not hard, to practice it is difficult; in moments of haste and peril, one should always be mindful..."*
Chapter 386