The Yin Yang doctrine is very simple but its influence has been extensive. No aspect of Chinese civilization - whether metaphysics, medicine, government, or art - has escaped its imprint. In simple terms, the doctrine teaches that all things and events are products of two elements, forces or principles: yin, which is negative, passive, weak, and destructive, and yang, which is positive, active, strong, and constructive.
"Daoist perspectives on Chinese and global environmental management,"
Culture Mandala: The Bulletin of the Centre for East-West Cultural and Economic Studies: Vol. 4
, Article 2.
Available at: http://epublications.bond.edu.au/cm/vol4/iss2/2