Title "Quote" Definition

The Quote "What you see is only half of what there is" is a quote I heard from a movie series called Ghost Whisperer. I think that this quote means to keep your mind wide open because what you see is sometimes not all of what there is. For example. Some people might be able to see ghosts (Just maybe. I personally believe in ghosts.) however some people might not believe because they cannot see. So I basically think that you just have to keep your mind wide open because the truth is that you cannot see everything there is in reality.