http://www.thegreattao.com/html/introyingyangtheory.htmlhttp://www.tao.org/tao.htmlTaoism is both a religion and philosophy with roots extending to ancient shamanism. It is codified in the Tao Te Ching, history's second most translated book after Christianity's Holy Bible. Its eighty-one poems were written in 500BC by the Sage, Lao Tzu. Interest in the Tao Te Ching has remained largely unfulfilled due to its mysterious interpretations, often contradictory and sometimes bizarre. These conflicting views are regrettable because Lao Tzu insisted on Ultimate Clarity, with confusion regarded as a cardinal sin. It's ironic that mystification shrouds a philosophy that allowed neither internal contradictions nor imprecise logic. With so many different explanations available, Taoism has become difficult for Americans to grasp, making it fascinating but also vague. The Temple of Original Simplicity is committed to teaching classical Taoism without the distortions of time and culture, holding to the core philosophy intended by the Great Sage.
http://www.bbc.co.uk/religion/religions/taoism/beliefs/concepts.shtml