What are Trigrams?
Trigrams, as we know them, represent the many combinations of Yin and Yang possible in Heaven, Man, and Earth planes represented by three lines. Each line is either full for Yang or broken in half for Yin. Given the huge number of Yin/Yang combinations possible with three lines and also given how large the data set would be for the same calculus using Five Element combinations, it makes sense that in ancient times, Fu Xi focused only on the Yin/Yang combinations and left the Five Element combinations to be handled by future scholars of Fu Xi Wen. Trigrams represent Yin and Yang in three energetic planes. Heaven marks the top line. Man is found in the middle. And Earth is represented in the bottom line of a trigram. There are I-Ching methods you can utilize to make tissue diagnosis, but I am not going to write about them now. Instead, I am going to focus on Fu Xi Wen pulse diagnosis in which we determine the tissue-angles in Heaven, Man, and Earth in the pulse all at the same time. Puls