I hope to recieve an answer (:
I'll try to be as precise of what I want
Mental metaphors/symbols might include, emotional baggage, figments of the imagination, emotional barriers, personal demons. While they are there, there isn't LITERALLY baggage, figments, barriers and demons in your mind.
Concepts of the mind that are intangible: The id, ego, and super-ego, memories, the imagination, etc. These are there, but they aren't able to be felt.