Three-line trigram
Heaven Trigram
乾 · Qian
Heaven is associated here with creative force and the image of sky. Its bottom-to-top binary line pattern is 111 where 1 represents yang and 0 represents yin.
Heaven as a lower or upper trigram
As the lower trigram, Heaven describes the inner or initiating three lines of a hexagram. As the upper trigram, it forms the outer or completing three lines. The meaning of a full hexagram comes from the complete six-line figure and textual tradition, not from simply adding two trigram keywords together.