One half is black. The other half is white. Each half contains a smaller circle of the opposite colour. The black and white halves within the circle represent Yin (female energy) and Yang (male energy) whose interplay give rise to the manifest world of the Five Elements and the Ten Thousand Things. The one could not exist without the other for each contains the essence of the other . It is about the relativism of the world and is therefore a deeply sane and rational view of everything.
In the West we like to divide opposites as being in two camps, like a battle line drawn between two opposing armies. We preoccupy ourselves with being able to conquer death, eliminate darkness etc. instead of realising how nothing would be possible without this dynamic exchanging interplay. All of relative existence is in constant flow and change and to resist it is to create for ourselves unnecessary strife. Instead we can develop a more relaxed attitude to life when we learn to accept the relativistic truth as symbolised in the interplay of Yin and Yang. As Lao Tzu writes (1982: p.58),
“ Thus Something and Nothing produce each