JI WU or WU-USEFUL PHILOSOPHY CH'I
The photo on the right side is the image of a room where part of Wu Ji (The Supreme Potential use) has already " birth" to Yin-Yang of T'ai chi, this means that in this picture we see well-defined shapes, shadows, maybe the sides and center the room, etc., however, there is still potentially "another " Wu Ji state (where is the front, left, back, right?) which can manifest again another "birth" of the Yin-Yang , ie we can use this room in multiple ways to meditate, sleep, reading, cleaning, etc.
The Wu Ji's room this picture (its potential use) has not found a definitive expression (a particular purpose). Right?
All movements of T'ai Chi Boxing possess these " potential" inherent when the movement is still undifferentiated, somewhat ambiguous (perhaps a feeling, a pulse, a vibration, an idea), and this potential is in the mind. By the time we ourselves will continue these "natural tendencies" (their energy and angular momentum) the movement (the momentum) and give them the "final form" (families of movements) that the sequence calls (White Crane, Hitting the Tigre, etc.), at the time this whole cycle Ji-Wu-Wu Ji T'ai-chi T'ai chi ... is perpetuated to the end so more natural, harmonious and less controlled, manipulated, forced or artificial.
born From Wu Ji T'ai chi T'ai chi and return to the origin, ie, the Wu Ji.