I believe that jewellery pieces are decorations to show one’s style or wealth and containers of personal emotions. Each jewellery piece should have its story behind it, therefore people are given the object's soul. “Soul” has geometric hollow patterns around the ring, and the seemingly random shapes can only be read as a meaningful word from a specific angle.
Jewellery is a private and intimate object, and the hidden message will not be seen when “Soul” is worn. It is something that belongs to the owner only.