This is very similar to the Daoist idea “reversal is the movement of the Dao”. The “supreme ultimate” creates yang and yin: movement generates yang; when its activity reaches its limit, it becomes tranquil.
Through tranquility the supreme ultimate generates yin. When tranquility has reached its limit, there is a return to movement. Movement and tranquility, in alternation, become each the source of the other.
The distinction between the yin and yang is determined and the two forms (that is, the yin and yang) stand revealed. By the transformations of the yang and the union of the yin, the 5 elements (Qi) of water, fire, wood, metal and earth are produced.
These 5 Qi become diffused, which creates harmony. Once there is harmony the 4 seasons can occur. Yin and yang produced all things, and these in their turn produce and reproduce, this makes these processes never ending “
This idea in turn gets re defined by those practicing taijiquan, a Chinese Martial Art said to be based on taiji principals.
The most common way of expressing yin and yang concepts retaliative to taiji, is soft and hard, that is yin is thought to be soft, turning to hard at the end of its cycle, a way of looking at it usually interpeted as the yin being defensive and yang being offensive.
This model will not really fit into the our practice, there is still the idea of force or hardness which would be contrary to really using the internal concepts and methods this practice focuses on.
“first in mind then in body” often repeated in the taiji training, emphasizing the minds key role in taiji training.
The taiji symbol illustrates this very well, the mind as the active yang component still must have some connection with the body, and the body the yin tranquil component connected and directed by the mind.
1. condition the body to be able to fan song, and move in accordance with the minds direction
2. be able to feel this intention thought out the body, understanding the meaning of empty and full.
3. be able to feel others empty and fullness, joining with it so that with 4oz we can move a 1000lb, it would be better to say lead a 1000lb to emptiness.
Concepts and ideas are very important, they tend to determine ones practice methods and understanding. Be sure that you are clear in your training, question and test all ideas and concepts.