Sure, I can share. Who we are is not a physical construct. If we assume Naturalism is true (nothing beyond physical world), at most we are idea/program generated by the brain.
However, in either case, we require perception and to be perceived to exist.
Now to have an exact reality and not to be an illusion of having an exact reality, we must exist in perfect sight or vision or judgment or a perfect witness must be generating us and accounting us for our deeds.
To show this is easy, just reflect on yourself and see that you are estimating who you are, but that it relies on the assumption you have an exact reality. If there was no exact reality, it would be chasing the wind and nothing to see and base the construct on.
Like a child drawing an airplane, he doesn't know all the fine tune details that go the airplane, we know so little about ourselves and how we are who we are, despite witnessing ourselves our whole lives, it's akin to the drawing a picture of the real thing, but not knowing how the real thing really is.
The true reality of who we are, how we exist, then needs perfect wise and fair judge to account us for who we are. And think about what gives you value, it's the eyes of love. So the Perfect Loving Being is the only accountable perfect judge and vision to who we are. It's what knows who you are perfectly and better then all other potential witnesses.
In fact, we also must somehow be connected to this witness and vision, but perceive it and borrow it's vision from a lesser viewpoint, or else we can't be accountable for who we are.
This proves God, the witness, the guidance, etc... the metaphysical spiritual nature of who we are.
There are more proofs, but this one is pretty strong and I find it very intuitive and easy to recall and see God through.