I've hit a bit of a conundrum regarding the "proof of the existence of God" question.
You can't do it.
Ask a theist to define:
Supernatural
Divine
Faith
Spirit
Soul
God
And you get vague wishy-washy crap that either doesn't mean anything, defines itself with its own word/another magic word that tautology defines itself, or tries to point to something physical/material to define it but is never exactly the same as the physical thing and the special god-term possesses some nebulous "extra" quality that makes it MORE(e.g. the soul is often defined by pointing to the mind, the personality of a being, yet the words "mind" and "personality" are not interchangeable with soul because there's this as yet undefined special quality in soul that makes it MORE THAN a function of thinking or defining characteristics of a person/being).
They can't be hammered down and that's the point. They're mysterious. They're froo-froo magic.
Yet when you logically define things using scientific methods and terminology, you essentially break down how it works and what it is/what it does. So, asking for observable evidence of god, the divine, the spirit, is going to intrinsically change the nature of those things because the mystery, the vague unknown quality has been revealed and now the thing is just a "thing". It's real. We know how it works, what it is.
Erasing that mystery and limitless potential erases the supreme nature of these things. Because now they have limits. It's physical. If a theist ever came to me and brought me someone that I could physically touch, see, and communicate with, and they showed me some crazy power and explained "this is how that is done"(like mutated genetics or advanced technology, etc.) And then they said, "Here he is. This is my God. The one I told you about this whole time. The one who created the planet(through some interspace geological farming project where planets are amassed or his evolution allows him to have geo telekinesis where he could bring together rocks and elements from space into one giant mass) and created all life(through genetic engineering or bringing embryos from his own planet here, or maybe his evolution has allowed him to get pregnant and he literally had a few kids and plopped them here, etc.). He's really real!"
I would ask, "why are you worshipping some dude? He's right there. I can see him. He's not magic. He's not all-knowing. He's just advanced. He's got bowels and picks his nose just like you and me. Why are you on your knees for someone that merely got you out of a test tube and arrived here on a ship that takes fuel?"
Like, they'll never find "the guy" that is god, whether he looks humanoid or is some cosmic horror incomprehensible alien, because he doesn't fit into the vague mystery. Even if when they found him, he had a white beard and glowing white robes and owned all the shit in the Bible and Koran, once we pointed out that he could be physically explained and they were challenged for getting on their knees for a physical dude who poops and pees(or has some genetic mutation that eliminated his need to eliminate but that can be studied and explained), they might backtrack and be like, "that's not him."
You know. Like how they did when it was explained what lightning is. "That's not him. I thought it was but now that I know what lightning is, that's not him. That's not my god."
You can't do it.
Ask a theist to define:
Supernatural
Divine
Faith
Spirit
Soul
God
And you get vague wishy-washy crap that either doesn't mean anything, defines itself with its own word/another magic word that tautology defines itself, or tries to point to something physical/material to define it but is never exactly the same as the physical thing and the special god-term possesses some nebulous "extra" quality that makes it MORE(e.g. the soul is often defined by pointing to the mind, the personality of a being, yet the words "mind" and "personality" are not interchangeable with soul because there's this as yet undefined special quality in soul that makes it MORE THAN a function of thinking or defining characteristics of a person/being).
They can't be hammered down and that's the point. They're mysterious. They're froo-froo magic.
Yet when you logically define things using scientific methods and terminology, you essentially break down how it works and what it is/what it does. So, asking for observable evidence of god, the divine, the spirit, is going to intrinsically change the nature of those things because the mystery, the vague unknown quality has been revealed and now the thing is just a "thing". It's real. We know how it works, what it is.
Erasing that mystery and limitless potential erases the supreme nature of these things. Because now they have limits. It's physical. If a theist ever came to me and brought me someone that I could physically touch, see, and communicate with, and they showed me some crazy power and explained "this is how that is done"(like mutated genetics or advanced technology, etc.) And then they said, "Here he is. This is my God. The one I told you about this whole time. The one who created the planet(through some interspace geological farming project where planets are amassed or his evolution allows him to have geo telekinesis where he could bring together rocks and elements from space into one giant mass) and created all life(through genetic engineering or bringing embryos from his own planet here, or maybe his evolution has allowed him to get pregnant and he literally had a few kids and plopped them here, etc.). He's really real!"
I would ask, "why are you worshipping some dude? He's right there. I can see him. He's not magic. He's not all-knowing. He's just advanced. He's got bowels and picks his nose just like you and me. Why are you on your knees for someone that merely got you out of a test tube and arrived here on a ship that takes fuel?"
Like, they'll never find "the guy" that is god, whether he looks humanoid or is some cosmic horror incomprehensible alien, because he doesn't fit into the vague mystery. Even if when they found him, he had a white beard and glowing white robes and owned all the shit in the Bible and Koran, once we pointed out that he could be physically explained and they were challenged for getting on their knees for a physical dude who poops and pees(or has some genetic mutation that eliminated his need to eliminate but that can be studied and explained), they might backtrack and be like, "that's not him."
You know. Like how they did when it was explained what lightning is. "That's not him. I thought it was but now that I know what lightning is, that's not him. That's not my god."