My example of using road signs has gotten even better over the years with the advent of using picture images on signs. This is a sign with, for example, the picture of a deer. It's an image treated as a sign. Symbols Images, when treated as symbols, are images which have meaning in and of themselves. The image of a deer, looked at as a symbol, is pregnant with meaning and associations for each one of us.
Signs are images that point to something else.
They have little or no intrinsic meaning. Freud believed the unconscious was purposely hiding the meaning of the images from our conscious minds. Further, Freud obviously didn't much like or trust the unconscious. Jung, on the other hand, treated dream images as symbols intent on bringing healing to the psyche. Images, when treated as symbols, are images which have meaning in and of themselves.