~* Wednesday, September 15, 2004 *~
Components of Hexagrams
The solid line represents yang, the masculine, creative principle. The open line represents yin, the feminine, receptive principle. These principles are also represented in a common circular symbol (☯), known as taijitu (太極圖), but more commonly known in the west as the yin-yang (陰陽) diagram, expressing the idea of complementarity of changes: when Yang is at top, Yin is increasing, and the reverse.
In the following lists, the trigrams and hexagrams are represented using a common textual convention: horizontally from left to right, using '|' for yang and ':' for yin. Note, though, that the normal diagrammatic representation is to show the lines stacked vertically, from bottom to top (i.e. to visualize the actual trigrams or hexagrams, rotate the text counterclockwise 90°).
There are eight possible trigrams (八卦 bā guà).
||| Force (☰ 乾 qián) = heaven (天)
::: Field (☷ 坤 kūn) = earth (地)
|:: Shake (☳ 震 zhèn) = thunder (雷)
:|: Gorge (☵ 坎 kǎn) = water (水)
::| Bound (☶ 艮 gèn) = mountain (山)
:|| Ground (☴ 巽 xùn) = wind (風)
|:| Radiance (☲ 離 lí) = fire (火)
||: Open (☱ 兌 duì) = swamp (澤)
The first three lines, the lower trigram, are seen as the inner aspect of the change that is occurring. The upper trigram, the last three lines, are the outer aspect. The change described is thus the dynamic of the inner (personal) aspect relating to the outer (external) situation. Thus, hexagram 04 :|:::| Enveloping, is composed of the inner trigram :|: Gorge, relating to the outer trigram ::| Bound.
Exerpt From Wikipedia