This symbol represents that world.
Within this symbol, you will find two very ponient images: the yin-yang and the dragon and phoenix.
The yin-yang, though well-known, has much greater meaning and history than most people probably believe. Based on shadows cast by an eight-foot pole throuought the course of the year, Yin is the portion in shadow, while Yang is that in light, the two circles of opposite color representing the necessity of each for the other's existance.
These two words, Yin and Yang, each have various meanings. Yin symbolizes the dark and night; it is also often thought to represent evil, cold, and weak. However, it also symbolizes passiveness, earth, groundedness, and the feminine. Yang is the opposite, representing light and day, good, warmth, strength, agressiveness, heaven, fire, flightiness, and the masculine.
The other piece of my symbol is the phoenix and dragon motif. Also very popular, it's true meaning is also often shrouded in ignorance.
The motif of the dragon and phoenix was born in China, where the two represented the emperor and empress, respectively.
The dragon, among other things, is a symbol of creativity, good fortune, and masculinity. I abhore all western thought towards dragons being evil, threatening, or possessive; this was never the original idea of the creature and I have never liked it. The phoenix is a symbol of beauty, good luck, and the feminine. It is the bird that rises from the ashes of its own death. Together, the two empower a meaning similar to that of the Yin Yang, as a balance of opposites.
The world exists as a balance. Even the most basic laws of physics state it: for every action, there is an equal and opposite reaction; what goes up must come down. In all things, there is a balance; therefore, everything that exists must be in balance to some other thing. Hense, there is nothing "evil" or "wrong" in the world, just different.