I'm not being humorous or sarcastic when I ask you whether you think our old dog didn't have a spiritual nature, a strong sense of empathy and communion with the emotions of our family?
We have found that humans have evolved with built-in moral tendencies ─ the obvious one is child nurture and protection, a common tendency in nature; and more (but not completely) exclusively, and appropriate to the evolutionary advantages of living in groups and working cooperatively, dislike of the one who harms, like of fairness and reciprocity, respect for authority, loyalty to the group, and a sense of self-worth through self-denial. To these we can add an evolved conscience and an evolved capacity for empathy. (I described one of the experiments on which this is based
>here<.)
And for our spiritual nature, we also have an evolved reaction to the unexpected and the unknown, in very many cases to instantly devise a narrative hypothesis in our head to explain it, which may or not be supported or refuted by further evidence. You hear an unexpected noise by day, and think it might be a (say) helicopter, or by night, and think it might be a (say) stray cat. So way back when your very distant ancestors saw the phenomenon of lightning, heard the consequent thunder, they required an explanation, and provided it in the form of an imagined purposeful agent.
Or back in my student days when I drove a taxi at times, when a piece of timely good fortune gave me a good fare on a slow night, I found myself murmuring 'Thanks, TG!' and then, having noticed that this is what I'd done, realized that TG stood for Taxi God. In other words, I'd gratefully attributed good luck to (once again) an agent. This fits in with the line attributed to DG Rossetti, 'The worst time for an atheist is when he feels thankful and has no one to thank.' In other words, I think we've evolved to attribute agency to the unknown, good or bad, because we're built to
need an explanation.
But then, my own position considering these things (after being raised a Pisco, more as a matter of good manners) has itself evolved over time. I think "objective reality" (here "reality" for short) means "the world external to me, which I know about through my senses"; that "truth" is a quality of statements and a statement is true to the extent that it accurately reflects / corresponds with reality; and that a fact is an accurate statement about reality.
The problem is that the only way gods and other supernatural beings are known to exist is as ideas / concepts / things imagined in individual brains. Thus not only have there been countless different gods throughout human history with countless different attributes, but they're not compatible ─ they contradict the idea that there's a supernatural realm that humans in some unexplained way have access to. Instead they're cultural artifacts. Thus there are no photos, videos, interviews with God, just ideas; and thus the Abrahamic God is described only in terms of imaginary attributes, such as omniscience, omnipotence, omnipresence, perfection, being eternal, being infinite. There's no description of God with objective existence such that if we found a real suspect we could determine whether it was God or not.
And the world behaves exactly as if God / gods / supernatural beings were only ideas, concepts, cultural artifacts. God doesn't stop children from drowning in backyard swimming pools, doesn't prevent the massacres at schools, doesn't do or say
anything. People ─ our fellow humans ─ do all the saying and all the doing (if any).
I suspect that the benefit of belief in a god is tribal, part of the all-important tribal identity to which loyalty is owed and cooperation is made possible. Other parts of that identity are having in common language, customs, folk histories, just-so stories, and an imagined tribal protector ─ which is how Yahweh started out, one of the gods the Canaanite pantheon, apparently then with a consort, Asherah, as was customary.