Yin & Yang

In the I Ching the feminine energy yin is symbolized by a short broken line. The masculine energy yang is symbolized by a short unbroken line.
Yin:
- A broken line.
- Earth.
- Feminine.
- Passivity.
- Stillness.
- Cold.
- Potential energy.
- Interior.
Yang:
- A solid line.
- Heaven.
- Masculine.
- Activity.
- Movement.
- Heat.
- Full energy.
- Exterior.
Chinese belief has it that at the beginning of the universe the two primary powers yin and yang interacted and as a result there were four different energy combinations. Each contained either solid or broken lines, or a combination of both. The top line represented heaven and the bottom line represented Earth. At a later date a third line was added to give the more recognizable form of the trigrams that go to form the hexagrams of the I Ching that we know today. These three lines represent the trinity of cosmic unity between Heaven, earth and humanity and are known as the san cai.