Although many books on tai chi assign the eight internal energies of peng, ji, lu, an, lieh, tsai, kao and jou to the eight trigrams, they are not manifestations of the trigrams themselves, otherwise bagua—the art form of the I Ching—would employ that methodology. In bagua’s palm changes, all eight internal energies are used in each palm and yet each palm develops the energy of a single trigram.
Likewise, in tai chi, you stream through the eight internal energies as you practise your
form and yet your focus remains on developing the energy of a single trigram. When
practising a form or any section that is highly familiar to you, your focus is placed on the trigram of your choice, the energy behind the symbol. You then attempt to make the jump
and contact that particular primordial energy.