Somnambulism, a kind of Schizophrenia

In Esoteric Buddhism, there is a book called《The Profound Inner Principles 甚深內義根本頌》(remark: it was written by the third Karmapa Rangjung Dorje, 1284-1339 and the English edition translated by Elizabeth M. Callahan which was published in 2014) which talks about theories of Nadis (the channels through which energy of the body is said to flow氣脈). Comparing these theories with the ones in similar Chinese books, namely《Yellow Emperor’s Inner Canon/Nei Jing內經》and《Yellow Court Classic/Huang Ting Jing黃庭經》etc., each of them has its own unique part/parts. Though both Tibetan Tantra and Taoism advocate the cultivation of Nadis, there is one thing which demands special attention. It is the technique of ‘looking at oneself through a mirror’. No matter whether it is (the practice of the one mentioned in) Esoteric Buddhism or ‘Yin Shen Shu陰神術’ of Chinese Taoism, it is very easy to cause Somnambulism which is a kind of Schizophrenia. Never try such kind of practice readily as it must only be carried out under the guidance of experienced and enlightened Guru.