Lesson 5 of 5
The Eight Trigrams
Three lines, eight signs, and the world in symbols.
The idea
Stack three yin or yang lines and you get eight trigrams: heaven, earth, thunder, wind, water, fire, mountain and lake.
Two trigrams make a hexagram, which is the language of the I Ching. They also map onto directions, which is the base of feng shui.
Sources Drawn from the learn pages of this site.