Wu wei is a Taoist concept referring to non-action or non-exertion. It emerged in ancient China and describes a state of personal harmony and spontaneity. Wu wei has two meanings - an attitude of genuine non-participation in human affairs, and a technique to gain enhanced control. Taoism also believes that everything is in a constant cycle of flux as extremes will inevitably revert back to their opposite. The goal of Taoism is to attain the original, undifferentiated source and order of nature before duality.