Feng Shui

Feng Shui  is a Chinese philosophical system of harmonizing everyone with the surrounding environment.  The term feng shui literally translates as "wind-water" in English. This is a cultural shorthand taken from the passage of the now-lost Classic of Burial recorded in Guo Pu's commentary: Feng shui is one of the Five Arts of Chinese Metaphysics, classified as physiognomy (observation of appearances through formulas and calculations). The feng shui practice discusses architecture in metaphoric terms of "invisible forces" that bind the universe, earth, and humanity together, known as qi.
                                                                                                                 
                                                                                                                      Wikipdia
      
   Something that caught my attention, is that people who do feng shui or those who believe in this practice do not use mirrors in the bedrooms because they could scared the heck out of you.

On the other hand the use of mirrors in other rooms of the house reflect Ch'i which is an invisible life force or energy, they help circulate that energy and the double your abundance.