天 Tian – Heaven is an abstraction of the most supreme in your body. Normally we connect Tian with the brain. Meaning that we are speaking about the mental aspects of Chinese medicine and more correctly Chinese psychology. In this context, Tian includes elements like the objective presence of a persons actions and the congenital inborn patterns of actions or behavior (the congenital animal that lives in all humans), our subjective presence and our elevated sacral understanding of the human soul. Tian is visible through our actions, and fundamental in all human beings. The Yang aspect of Tian in our body are the mental aspect, and the Yin aspect of Tian are our brains regulation of our physical body.
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