CeleryKills

First, there are no short answers to that question, when so many fundamental differences exist between a theistic mindset and a scientific mindset.

When someone asks me what proof I would need to believe in a god, I start by clarifying the ground rules. If a claim affects the world we all share, then the evidence should live in that world too. I would look for something public and testable that holds up when people who disagree try to break it. If there is a pattern of events that reliably contradicts everything we know about how nature works, and it repeats under controlled observation, that would get my attention. I am not interested in private revelations or stories that cannot be examined. I am interested in phenomena anyone can scrutinize.

Before any testing begins, I would also need a clear definition of what is being claimed. Vague talk about higher powers or cosmic forces gives me nothing to evaluate. If we are talking about a personal being with intentions, then those intentions should produce specific, observable effects. If the claim is about a timeless ground of being, then say exactly what that means and how it would ever intersect with evidence. If the definition cannot be made coherent enough to test, it is not a candidate for belief so much as a poetic idea.

I would also expect evidence that points to a particular god, not just to mystery. History is crowded with deities, scriptures, and competing theologies. If one of them is real, the evidence should distinguish that claim from the rest. Otherwise we are back to unexplained anomalies that could be anything. I am not persuaded by gaps in current knowledge. I am persuaded when multiple independent lines of inquiry converge on a single explanation that outperforms the alternatives.

Finally, I would not accept a standard that depends on faith. Faith asks me to believe first and seek reasons later. My approach is the opposite. Show me robust, repeatable, public reasons and the belief follows. If a god exists and cares whether I recognize them, they do not need me to override the tools that help us avoid error. They can meet those tools on their own terms.

Speaking personally, from a rainy corner of the Pacific Northwest where skepticism and stewardship often go hand in hand, I have never experienced anything that meets these thresholds. If a god wants to be known, they can show up in ways that do not require me to outsource my judgment or trust texts written when we did not know what germs were. Until then, I will keep using the same standards that help me navigate everything else that matters, from the science I teach my kids to the choices we make about the place we live.