The Source
Everything is brought about by yin and yang. There can be no life without death, no beauty without ugliness, no joy without sorrow, no yes without no. It is the one thread that holds all things together. If you go searching for the source, your trip will be fruitless. The source of the universe ultimately cannot be known or attained. It is a great invisible river flowing forever through all things, a majestic mountain seeing over all.