We humans have considerable liberty of action and of imagination. We can dream and construct mental imaginings which are impossible in physical reality. These are wonderful and stimulating of ideas, but ultimately we live in a world constrained by what is possible. We must live our lives within natural laws and within what is available to us. It is possible to explore distant places in fantasy, as science fiction routinely does, but we personally will never go to distant galaxies, or cross the Planck limits. Few of us will even go to so close a place as our Moon, although I have had brief conversations with one who has – Buzz Aldrin. That journey was tightly constrained within the limits of physical macro-reality; it was an extreme example of fantasy for most of humanity.
Humans are capable of fantastic things, but the more fantastic the activity the more constrained it is by the laws of Nature. Ultimately everything is contained within the nature of possibilities of things that can exist, but not a bit beyond. And yet, how useful is the imaginary number i, which is the square root of -1. It can’t exist in reality and yet many things function as if it does. Perhaps we can consider God to be like an imaginary number, G. It is something which doesn’t exist in our reality, and yet we can use the concept to get real-world effects.
I have never worried much about gods, because in the world which is observable this concept doesn’t have any traction. However, with the G concept floating about in human minds, which it obviously does in many people, there do occur real-world effects. G is nonsense and yet it works, just like i is nonsense but it works. That is why G is called supernatural because that is exactly what it is – outside of nature.