The piece that will go inside the mirror box is compose for 2 pieces and they interlock to each other , the box will have some holes and the public will have to look at the piece from the holes, they will see different shapes on each hole. The idea behind is perception can change the meaning or can change the shape, the mirror is representing the law of correspondence ,what is in is out and what is out is in.
The two pieces inside the box are intelock and become one. DUALITY.Every good quality has its bad side and nothing that is good can come into the world without directly producing a corresponding evil.
One example of this duality is that we cannot achieve wholeness without integrating the dark side of the self.