I don't know if I can elaborate. It's like defining Love, it can't be done. Maybe with some questions that can't be answered, but contemplated...maybe? And the depends upon a person's inner exploration of Self. So, what is our essence? Are we just a bunch of stuff? A bunch of matter? When I watched my infant granddaughter laugh and her eyes light up, where's that twinkle in her eye coming from? What I see is her inner essence of Life bubbling up in her eyes, her Soul if you will. Some more questions, where does the creative element of an artist bubble up from? Why are the Mystics of all of the various spiritual trajectories pointing towards our essence or Soul. What are they saying about this sort of stuff. These are a short example of the kinds of questions that the Mystics ask. But that trajectory is pretty unfamiliar territory in this forum. Sorry for not giving a direct answer to your question which really is a good one to be asking. But it also highlights what I said earlier in that I can't demonstrate spirit to anyone, though in a rough way Soul can be pointed to.