The Meaning of the 8 Trigrams and Bagua
The following is a very basic explanation of the The Meaning of the 8 Trigrams and Bagua. There are many books and resources that go into greater depth regarding these ancient concepts of balance and harmony.
The four phases that are generated by the two poles (yin pole, yang pole) are represented by Metal, Wood, Water and Fire. They also assume the manifestation of four strengths: greater yang, lesser yang, greater yin and lesser yin. The four phases yield the eight trigrams. Heaven-Lion, Earth-Unicorn, Thunder-Dragon, Wind-Phoenix, Water-Snake, Fire-Hawk, Mountain-Bear and Lake-Monkey. The Zhou Yi also represented the above derivation with symbols. The straight line represents the Yang phase and a broken line represents the Yin phase.
The following diagrams will help you see the progression of the development of the Eight Trigrams.

This concept then translates into the graphical representation of the bagua, or eight- sided figure as shown below.






