You may have even a certificate from a bank. The signature of the manager of the bank is there as a certificate for deposit. All the money is in the bank only, not in your hand. You have only one signature of that man, and you are holding it as if the whole world is in your hand. It has no value except that you believe in your mind that it has a value.
All value is mental, psychological, ideational, based on consciousness.
Finally, consciousness is the reality, not the visibility of a thing. You yourself are not the person sitting in front of me and talking to me. Neither of these two terms of relation in the conversation can be regarded as one body talking to another body, nothing of the kind. It is not body talking to body, not body listening to body. It is a consciousness in you appreciating the manner in which my consciousness operates.